—A base for the rail, not a bracket for the tub

The fit list is a wall-thickness chart with the numbers taken out.

Name: The Hot Tub Cup Holder
Brand: Steadi Labs
Rating: 4.92 (98 reviews)

Bestway’s Lay-Z-Spa drinks holder “simply slots over the sidewall.” Their accessories guide says it fits all their tubs except drop stitch. Their own product page then excludes eight models by name. Wave Spas’ foam holder fits three of their spas and is not compatible with seven.

One mechanism explains every one of those lists. A slot has a fixed throat, so it needs a wall inside a narrow band of thicknesses — and that rules out the thinnest tubs and the ones with the most rail to set a drink on, at opposite ends of the same list.

122 reviews · 4.9 average · 98 verified purchases

See the packs

from $14.95 · free shipping on every order

Ships from Orange, California. 90 days to change your mind, used is fine.

Steadi Labs LLC — Scott Rodriguez, founder. Veteran founded.

3419 E Chapman Ave #411, Orange, California · hello@steadilabs.com

All 122 reviews, hosted on Judge.me — not on this site →

“First time I have ever ordered from Facebook feed. Very easy. Happy with product.”Steve Butler · 8 August 2026

A slim can standing in a sage Steadi on wet stone coping, with pool water behind it. — Sage, on wet stone coping. We have not photographed this at a spa rail, and we are not going to build one in a computer and tell you it is a photograph. What the frame shows is the part that carries over: a hard, wet, level edge.

—Read this before you buy anything for your tub

Same circle on your deck. One fits, one doesn’t.

These two Lay-Z-Spa tubs have the identical exterior footprint. Everything below is Bestway’s own published specification, looked up on 2 September 2026.

Bestway’s own spec sheets	Miami (TriTech PVC)	Helsinki (FortiFiber drop stitch)
Exterior	180 cm × 66 cm	180 cm × 66 cm
Water capacity	669 L (177 gal)	1,123 L (297 gal)
Seats	2–4 adults	5–7 adults
Drinks holder fits?	Yes	No

Same circle on your deck. Roughly two-thirds more water and twice the people inside it. Bestway explains the difference themselves: drop stitch uses thousands of internal threads to hold the two walls together, which gives “much thinner walls than a regular inflatable hot tub” and therefore more room inside.

That gap in litres is the wall. And the tub with the thinner wall is the one the tray will not fit, because there is not enough wall left for the slot to grip.

Now read the other end of the same list.

Wave Spas excludes its own best edges
Tahoe, Garda and Como are Wave’s foam-wall spas — 12 cm walls on the Como and Tahoe, 15 cm on the Garda. Wave’s own description: “The walls don’t flex or wobble. You can sit on the edge, lean against the wall, and the spa holds its shape.” That is roughly 4.7 to 5.9 inches of firm, non-flexing top edge. All three are on the not compatible list.
Bestway’s exclusions run both directions at once
Three of the eight models their drinks holder excludes — Helsinki, Singapore and Vancouver — are the drop stitch tubs their accessories guide blames. Four more — Oslo, Carrara, Toronto and Stockholm — are the opposite kind of tub: the ThermaCore foam-wall range, where rigid foam panels slot inside the liner to build the thickest walls Bestway sells. The blog names one of the two.
Intex publishes the list as SKU numbers
The 28500E attachable cup holder and tray is sold “for select PureSpa models” — 28401, 28403, 28404, 28413, 28421, 28423, 28453 — which is a fit list written in part numbers you would have to dig out of a manual to match.

It is not carelessness. It is the mechanism. A slot has a fixed throat, so it needs a wall inside a narrow band of thicknesses. The thinnest tubs fall out of the bottom of that band and the best top rails fall out of the top of it. If you have been reading fit lists as a quality signal, read them as a thickness signal instead — and notice that the better your top edge is, the less likely a clip-on is to fit it.

See the packs — from $14.95

Sources, all quoted as published and fetched 2 September 2026: lay-z-spa.co.uk (accessories guide, drinks holder product page, Miami and Helsinki product pages, foam-wall collection) · wavespas.com (drinks holder product page, foam-wall comparison) · intexcorp.com · target.com (Intex 28500E listing).

—What your tub actually hands you

Seven ways a tub is built. The accessory aisle is designed for one of them.

By construction rather than by brand, because construction is what decides this. Read down the row you own.

Traditional inflatable

Wide, soft

the aisle’s only customer

TriTech and I-beam PVC — Lay-Z-Spa Miami, Paris, Vegas; Intex PureSpa Bubble. A genuinely wide top ring with no firmness anywhere in it. It dips under a forearm and reshapes when somebody climbs in. This is the class the clip-on trays are actually built for.

Drop stitch

Rigid, narrow

nothing slots on

Helsinki, Singapore, Vancouver; Wave’s Ontario. Thousands of internal threads pull the walls thin, so you gained interior room and lost the shelf. Rigid, and barely any top edge to be rigid.

Foam wall

12–15 cm

the best edge, unserved

Wave’s Como, Garda and Tahoe; Lay-Z-Spa’s ThermaCore models. The widest firm edge in the portable world, and the least served by accessories. If you own one of these, stop shopping for a clip-on and start using the edge you already have.

Rotomolded

Often solved

check it with a level

Freeflow, AquaRest and much of the plug-and-play category. AquaRest advertises eight cup holders on the DayDream 3500L. Do not assume — Hot Spring’s spec sheet for the Freeflow Monterey lists none, and an owner review on AquaRest’s own site says the wells “are not even and bend down.”

Acrylic built-in shell

Most surfaces

least obvious answer

Hot Spring, Bullfrog, Jacuzzi, Marquis, Master Spas. A single sheet of acrylic vacuum-formed over a mould and reinforced, sitting on a frame inside a cabinet. The inner lip is a rolled edge shaped to shed water. Where a separate ledge rim exists, that band tends to be flatter than the crowned lip.

Soft-sided

No hard edge

by design

Softub and similar. Padded marine vinyl over foam, with no hard edges anywhere. That is the design brief, and it costs you the shelf.

Cedar & stock tank

Wide, flat, wooden

nothing to clip to

The best drink surface in the entire category, and nobody sells an accessory for it, because there is nothing to clip onto — just staves and a stainless band.

Or on the flat

5.2″

no model to match

A 5.2-inch moulded base, 3.6 ounces, that the drink stands in. It has no interface with the tub at all, so there is no list — only the question of whether your rail has a flat span that wide.

And three more things a fit claim answers without telling you.

Is there a cabinet to screw into — and should you?
The Leisure Concepts SpaCaddy is a 27″ × 19″ polymer tray on a 2-inch aluminium post, installed with “one composite mounting bracket with eight screws,” and says it mounts on almost any spa. Master Spas’ SmartBar is a 39″ × 14″ tray on two brackets, installed by marking pilot holes against your spa and drilling. “Fits almost any spa” is a geometry claim, not a serviceability claim. Canadian Spa Company’s own guidance is blunt: do not install through “a cabinet panel that is located in front a Pump, Control Pack, Blower, or Gate Valve,” because “these panels will likely need to be removed at some point for maintenance or servicing.” Master Spas adds that panel removal “can vary between hot tub models.” On a rotomolded unibody or an inflatable there is no frame at all, so the whole category is off the table.
Does the cover still close, and does the lifter still swing?
Your cover lifter already owns a band of your rail and a band of your ground. Depending on the model, CoverMate lifters need anywhere from about 6 inches to 25 inches of clearance behind the spa, and most attach to the side of the tub with their own brackets. An accessory can fit your rail perfectly and still be standing in the lifter’s arc — which is the failure mode that kills clip-on trays specifically. They fit, they work, and they have to come off before every single cover-on.
What counts as a “standard” drink?
Intex’s tray is 10.25″ long, 8.63″ wide and 7″ high and holds “2 standard size beverage containers.” Standard was defined when standard meant a 12-ounce can; the whole tray is about ten inches long, so the wells inside it are a good deal smaller than that. Worth reading the rest of the fine print too: Intex says the tray is “not for use with hot liquids, alcohol, glass, breakable cups, or electrical objects.”

Sources, quoted as published and fetched 2 September 2026: leisureconcepts.com · masterspaparts.com (SmartBar, cover lifter buying guide) · masterspas.com · support.canadianspacompany.com · hotspring.com (Freeflow Monterey, shell construction) · shopaquarest.com · intexcorp.com · target.com · wavespas.com · lay-z-spa.co.uk.

—How it holds, and exactly how far that goes

Width — and only where the width is touching.

The base

5.2 inches across and fixed. It widens the base of support under the container, so the drink’s centre of mass has to travel further sideways before it passes outside that base. Tipping therefore takes a much larger tilt.

The fins

Six of them, holding the bottom inch. Cans and bottles slide on over the top; glasses and tumblers drop in through the fins. Drink and base then move as one piece rather than two.

The material

One piece of Shore 85A TPU. Nothing bonded on, nothing clipped on, nothing to work loose. Its own tack resists sliding on a wet surface.

The catch, said plainly

The widened base of support is only delivered where the footprint makes contact. On a crowned acrylic lip where a strip of the base touches, you get whatever the crown gives you — not the full 5.2 inches. That is the entire reason this page is about finding the flat span on your own tub instead of about matching a brand name.

It resists tipping. It resists sliding. It is not spill-proof — nothing is, and a hard enough knock still wins. It does not do anything else, and this page is not going to pretend otherwise.

A macro photograph of the flared base of a terracotta Steadi, showing the moulded STEADI mark. — The flare, close. That width is the whole mechanism — where it is in contact.

—Two numbers, and you own both of them

The base of your cup, and the flat span of your rail.

A standard 12 oz can is 2.6 inches across the bottom. A Stanley Quencher 40 oz is 3.1 and seats snug. A handled mug does not seat at all — the handle lands exactly where a fin needs to grip — and a stemmed glass is a straight no. If your January soak is a mug of cocoa or a toddy, this is not your product, and we would rather say that here than take the order.

Search by container

Every width below comes from a published specification, not from us. Where a spec is uncertain, the answer says so.

Container

Or the width across the bottom

Width in inches

A width across the bottom of the cup, in inches.

A close macro of the outer edge of the flared base where it meets the surface it is standing on. — The outer edge of the foot. This is the ring that has to land on something flat.

Two sticky notes, and no tape measure

A standard sticky note is three inches square. A cup standing on one with its base inside the paper will seat in the fins — that is the drink half of the question, and it is the same test people use at the kitchen counter before the water is even warm.

For the rail, lay two of them edge to edge. That is six inches, a little more than the 5.2 the base needs. If a straight edge does not rock across that span, you have room and then some.

Anything borderline — hello@steadilabs.com reaches a person, and the answer will be honest either way, including a no.

Several different cans, from a slim seltzer to a tallboy, each standing in a terracotta Steadi on a counter. — Cans, seltzers, tallboys and stovepipes, all on the same fixed 5.2-inch foot.

—Five minutes, once, with a ruler

Survey your own tub and you never read a fit list again.

You need a ruler, a straight edge — a paint stirrer, a level, the handle of a wooden spoon — and your phone. Do it once and write the numbers on a scrap of paper inside the cabinet door. They answer every fit claim you will ever read, ours included.

Wall or rail thickness at the top edge
Lay the ruler across the top of the wall, front to back, and read the total thickness. This is the number every slot-on, clip-on and slide-on product is really asking about, and the number none of them will give you.
Flat width, not total width
Lay the straight edge across the top surface and find the span where it does not rock. That span is your real bearing surface, and on a crowned acrylic lip it can be a startlingly small fraction of what the rail looks like from across the yard. Take it in three places, because they will not agree: in front of your usual seat, at the nearest corner, and on the cool-down seat.
Slope
Leave the straight edge in place and set a small level, or your phone’s level app, on top of it. A rim pitched to drain is doing exactly what it was designed to do. You only want to know which way it runs, because that decides which side of the rail is the good side.
The cover’s footprint
Close the cover once with your hand parked where the drink would live, then swing the lifter. Anything that fails this test fails it every evening for the life of the tub.
The cabinet
Identify which panel is the equipment door before you consider driving a screw anywhere near it — and, having identified it, consider not driving one at all.

Most people find the same thing: the best spot is not where they have been putting their drink.

On an acrylic shell, the corner
The shell’s radius pulls it away from the cabinet’s straight run, so a corner is usually wider and flatter than the stretch of lip directly in front of your seat. Corners are big enough to matter — The Cover Guy’s worked example for measuring a cover is a 5-inch corner radius, and cabinet replacement kits sell flex corner panels rated to wrap “up to a 12″ radius.”
The cool-down seat, and the ledge rim if you have one
The cool-down seat is flat, above the waterline, and within reach from most seats. And where your cabinet has a separate ledge rim, that is a genuinely distinct surface — you can tell because cover-measuring guides ask you to measure the acrylic shell and the wooden ledge rim as two separate dimensions.
On a foam-wall inflatable, the top edge you already own
Four to six inches of firm rail that the accessory aisle will not sell you anything for. This is the one case where the answer is simply to use it.
And everything one step back from the water
The cabinet edge, the steps, the deck rail cap, the patio table, the cooler lid. None of them are the tub, and all of them are flat.

Where it does not belong. A traditional PVC inflatable ring is not a flat spot. A 5.2-inch base loads the vinyl less per square inch than the can’s own base does, which is true and not the point — the ring still dishes and re-levels under every lean and every climb-in, and no base changes that. Put it on the deck, the steps or the table instead, and keep the ring for your elbows.

Sources, quoted as published and fetched 2 September 2026: thecoverguy.com · highwood-usa.com · hotspring.com · wavespas.com.

—What the aisle asks of your tub

Every other answer here has a compatibility list. This one has a measurement.

Prices, dimensions and requirements were looked up on 2 September 2026, not estimated. Every figure in the last column is the seller’s own published requirement, and where a seller does not publish a US price on the page we read, the cell says so rather than guessing.

The product	Price	What it asks of your tub
Lay-Z-Spa Drinks Holder (Bestway)	Not published in USD on the page we read	A sidewall inside the slot’s throat. Bestway’s own product page lists it as not compatible with the Singapore, Helsinki, Napa, Vancouver, Oslo, Carrara, Toronto or Stockholm — eight models, at both ends of the thickness range.
Wave Spas foam drinks holder	Not published in USD on the page we read	An edge it can slide onto. 6.2 × 8.2 × 8.6 inches of PU foam. Fits the Aegean, Atlantic and Pacific; “NOT compatible with our Tahoe, Garda, Como, Rome, California, Osaka, and Swift hot tubs.”
Intex 28500E attachable cup holder and tray	Not published on the page we read	One of seven listed PureSpa SKUs. 10.25″ × 8.63″ × 7″, holds “2 standard size beverage containers,” and is “not for use with hot liquids, alcohol, glass, breakable cups, or electrical objects.”
Leisure Concepts SpaCaddy	Not published on the page we read	A cabinet it can bite into. 27″ × 19″ polymer tray on a 2-inch aluminium post, fixed with “one composite mounting bracket with eight screws.” No frame means no install — that rules out rotomolded unibody shells and every inflatable.
Master Spas SmartBar	Not published on the page we read	Two brackets and a drill. 39″ × 14″, installed by marking pilot holes against the spa. Master Spas separately notes that panel removal “can vary between hot tub models.”
The Hot Tub Cup Holder	$14.95 · four for $39.95, $9.99 each	A flat span 5.2 inches wide, wherever you find one. No model list, because nothing touches the tub — nothing to unclip before the cover, nothing in the lifter’s arc, no screw near a service panel.

We are not claiming to be cheaper than any of them. Not one of those five publishes a price on the page we read, so that comparison cannot honestly be made and this page is not going to imply it. The column that matters is the third one.

And the honest concession: if your tub came with moulded wells and they are level, use them. They are already there and they cost nothing. AquaRest advertises eight of them on the DayDream 3500L. Put a level across yours before you assume the factory solved it — an owner review on AquaRest’s own store says the wells “are not even and bend down. So none of them can be used.” If yours are fine, close this page.

Sources, quoted as published and fetched 2 September 2026: lay-z-spa.co.uk · wavespas.com · intexcorp.com · target.com · leisureconcepts.com · masterspaparts.com · masterspas.com · shopaquarest.com.

—From people who bought one

None of these came from a hot tub. Two of them are four stars.

Verbatim and unedited. Steadi Labs has one product and one review corpus; nobody in it has written about a spa, so there is nothing here we can honestly pass off as proof from your setup. What these four are is the nearest thing the corpus actually contains — slope, an outdoor table, and two people telling us what they did not like.

A black Steadi on a grandstand bench holding a canned drink in a glitter koozie, a spectator's leg beside it, at an outdoor race — Photograph sent in by Holly J with this review.

★★★★★

Steadi- Just what I was looking for! I purchased these to use at our annual NASCAR race this month. They delivered beyond my expectations. Our seats are metal benches with a slight slope towards the back, making it impossible to set down any type of drink. We were able to use these for a 20oz bottle with a koozie on it as well as a slim can with an insulated Brumate on it! They worked perfect, holding our drinks on the bench & on our cooler. I highly recommend for sporting fans, boaters, outdoor adventures. Thanks for making these!

Holly J · June 2026 · a sloped bench and a cooler lid, which is the closest thing in the corpus to a pitched railPhoto from the buyerPhoto from the buyerPhoto from the buyerPhoto from the buyerPhoto from the buyerPhoto from the buyerPhoto from the buyer

★★★★★

They are great! They work very well in keeping the soda cans from falling over and spilling on the bed & couch when the three Beagles and one Border Collie jump on or off. They also stay steady on the little wobbly patio table outside.

Susan Ilkenhans · May 2026 · an outdoor table, one step back from the water

★★★★☆

not as steady as I would like but it is working just fine. It does slide a little. Overall it was a good purchase.

Randee Kirschbrown · August 2026 · printed here on purpose — sliding is the honest risk on a wet, pitched surface, and step three of the survey is where you find out which way yours runs

★★★★☆

Seems to work okay I though the base would be heavier

Elisa Hollers · May 2026 · also true. It is 3.6 ounces and it is not weighted — the width is what is working, and that is also why it sinks

18 more, photographed by the people who bought them

Sent in with their reviews. Tap any one to read it. Different rooms, different drinks, different colours — none of them staged by us. Some of these buyers were offered a small store credit for sending a photo; nothing was offered for what the review said, and none of them were shown to us before they posted.

A slice of one product-wide corpus — reviews of the Steadi, not of this page. The full corpus is published live, including the ones above.

—The limits, in one place

What it does not do.

It is not spill-proof — nothing is.
It resists tipping by widening the footprint the drink has to lean past, and it resists sliding because the TPU has some tack to it. A hard enough knock still wins, and a forearm at full speed on the way to the topside controls is a hard enough knock.
It does not attach to anything.
No clamp, no strap, no bracket, no adhesive, no suction cup. It stands on a flat spot and lifts off. If what you want is a drink fixed to the tub, a mounted side table is the product for that — with the screws, the service panel and the lifter arc that come with it.
It is not buoyant. It sinks.
Straight to the floor of the shell, jets running or not. Fish it out, rinse it, it grips exactly the same as before. We would rather you knew that now than found it out at 10pm.
We do not claim it holds through moving water.
The claim on this page is about a parked drink on a flat, stationary surface — the corner, the cool-down seat, the firm top rail, the cabinet edge, the deck. Jets on full, a wave from someone climbing in, an inflatable ring dishing under a lean: those are surfaces in motion and we are not going to tell you what happens on them from a desk in California.
A handled mug does not seat, and neither does a stemmed glass.
The handle lands exactly where a fin needs to grip, and a stem cannot seat at all. That covers the winter cocoa and the toddy, which for this crowd is not a small exclusion, so it is said here rather than buried.
It does not insulate and it does not seal.
It is a base, not a koozie and not a lid. Condensation still runs down the outside of the can, so on a wooden rail cap use a coaster the way you already would.
On a crowned lip you get the crown, not the width.
The mechanism is only delivered where the foot is in contact. If your rail is domed and only a strip of the base touches, the effect is smaller. Step two of the survey is how you find out before you order.

—Questions

Straight answers.

Will it fit my tub?

There is no fit list to check, because nothing on this touches the tub. The question is whether you have a flat span 5.2 inches across — on the rail, at a corner, on the cool-down seat, on the cabinet edge, on the steps or on the deck table. Step two of the survey above is how you measure it, and it takes about a minute.

I have an inflatable Lay-Z-Spa or Intex, not a shell.

Then the honest answer is that the ring is not where this goes. A 5.2-inch base spreads its load over more vinyl than a can’s own base does, but the ring still dishes and re-levels every time somebody leans on it or climbs in, and no base fixes that. Use the deck, the steps or the side table instead. If a foam-wall model is what you own, the top edge is 12 to 15 cm and it is the best surface in the category.

Does it hold when the jets are running?

We are not going to answer that with a claim we cannot stand behind. The jets move the water, not the rail, so a drink parked on a flat, level part of the rail is not being moved by them — but a wave from somebody climbing in, or an arm reaching past for the controls, is a knock, and a knock moves things. Nothing here is spill-proof and nothing here is fixed down.

What if it falls in?

It sinks. It is not buoyant, so it goes to the floor of the shell rather than drifting off across the surface. Fish it out, rinse it, and it grips the same as before. Worth saying up front because the floating rings this replaces fail the other way.

Will chlorine, bromine, sun and freezing nights wreck it?

It is one piece of injection-moulded Shore 85A TPU with nothing bonded or clipped on to peel or work loose, and it is dishwasher safe. There is no published weathering figure we can point you at, so rather than quote a number we do not have: ninety days from delivery, used is fine, and that is long enough to put one through a real winter at your own tub and decide.

Will it hold a 40 oz Stanley?

Yes. The Quencher H2.0 40 oz measures about 3.1 inches at the base, inside the range the fins flex to. It is a snug fit rather than a drop-in — it seats with a push.

Can I use a mug of cocoa or a hot toddy in it?

No. A handled mug does not seat — the handle lands exactly where the fins grip — and neither does a stemmed glass. That is a real limitation for a winter soak and there is no version of this that fixes it.

How many do I need?

One per person who actually soaks. Most households buy two or four. The four-pack works out at $9.99 each and colours are chosen per unit, which on a dark patio is how everyone keeps track of whose can is whose.

Why does this site only sell one thing?

Because it is one thing. It is a Steadi, made by Steadi Labs in Orange, California, and checkout finishes at steadilabs.com where the company lives.

—Still deciding

$14.95 for a piece of rubber.

It is. Against what the tub itself cost, and against the caddy that is already leaning off the cabinet, ninety days covers being wrong about it — used, with nothing to post back.

I already bought a caddy and it leaned.

A post-mounted caddy needs a straight pole and a flat cabinet wall to level against, and a spa cabinet is a curve wrapped around a corner — the same radius the cover people measure at five inches and the cabinet people build a flex panel for at twelve. There is no pole here to be out of plumb.

This is just another thing sold to me on Facebook.

Fair suspicion, and the way to test it is the third column of the table above. Every competitor requirement on this page is the seller’s own published wording with the seller named and the date it was read. If any of it is wrong, it is wrong in their words, and we would like to know.

My tub already has cup holders.

Then check them with a level and, if they sit true, use them — that is the cheapest answer on this page and it costs nothing. This is for the tubs whose wells are pitched, whose wells are the wrong size for a 40-ounce tumbler, or whose shell never had any.