Finally, somewhere to put your drink at the cold plunge.
4.9 from 119 Steadi reviewsA flexible-finned base holds your bottle steady on the rim, the deck, or the ground — right when hands still cold from the water are too clumsy to grip much of anything. It doesn't float, so it stays on the deck, not over the water; the cold and the wet don't bother it otherwise.
Add it to your setup — from $14.95Free shipping every order · 90 days to run it through real plunges · check your bottle with the sticky-note test above ↑
Will your thermos fit? A sticky note answers it, dry, before you get in ↓
What's really going on
Every plunge ends with a drink in your hand and nowhere dry to put it.
A session runs two to five minutes, so unlike a long soak, the drink moment happens on dry land — before you get in and right after you climb out — on whatever surface happens to be standing there.
On a rotomolded barrel or a steel stock tank it's narrow, curved, and cold to the touch — near the same temperature as the water underneath it. It's also the handhold everyone grabs climbing in and out, so the one spot a cup could balance on is busiest right when someone wants to set one down.
Splash and drip off every entry keep the boards wet through a whole session, and in a cold-weather routine the film can start to skin over with ice. Nothing sits level on a gapped board, and whatever's parked there is right where the next person steps out.
Setup guides recommend sealed concrete or epoxy around a home plunge specifically because it drains — and the same guides warn it gets slick underfoot once it's wet, which around a plunge is most of the time. A cup down there is low, easy to kick, and sitting in the runoff path the guides tell owners to slope toward a drain.
At the gym or spa, the tile between the sauna, the shower, and the tub stays wet from whoever went through before you, and nobody's claimed a personal foot of it. A shake bottle set down there gets kicked, knocked over, or picked up by the wrong person.
Polar-plunge mornings and beach meetups don't bring furniture. A thermos on cold sand tips and fills with grit; on an icy dock or frozen grass, one bump from the crowd sends a cup sliding.
It's not a crisis, any of it — just the two minutes on either side of every plunge, spent guessing where a drink can survive until you're back for it.
Fit, the easy way
Test it dry, before the timer starts.
lands in here
A square sticky note: 3 inches, exactly — the same ceiling, checked dry before the timer starts.
The classic square is exactly 3 inches on a side. That's a fact about sticky notes — and it happens to be the exact ceiling of what fits.
Do this at the counter with dry, working hands, not poolside with fingers that just came out of 39-to-59°F water. Look at the bottom, not the rim — tumblers taper and thermoses flare.
Base sits inside the square? It fits. Hangs over the edges? Too wide. A tiny puck lost in the middle — under 2 inches? Too narrow.
Settle it dry, at the counter, before the timer even starts — no guessing later with fingers that just came out of the cold.
Will mine fit
The bottom inch decides what fits the rim.
The rule is one line: a container base 2 to 3 inches across settles in. Every verdict below follows from it, checked with the cup dry, before it ever gets near the water.
- 40 oz Stanley-style tumbler fits
- Insulated travel tumbler (no handle) fits
- Vacuum thermos fits
- Electrolyte drink bottle fits
- Protein shaker bottle fits
- Reusable water bottle fits
- Canned sparkling water or coconut water fits
- Handled camp mug or cocoa mug handle in the way
There's a floor as well as a ceiling — under 2 inches, the base sits too loose. And the handled camp mug is the honest exception: the base fits, but the handle lands where a fin needs to grip, cold hands or not.
The full fit database — Stanley, Red Bull, Yeti, and 30 more, with sourced base measurements →
How it holds
Built for hands that just came out of the cold.
A curved barrel rim, a gapped deck board, sealed concrete — none of it is flat the way a table is. The wide base spans the gap or the curve instead of needing one flat inch to stand on.
Flexible fins hold the container by its bottom inch from the sides, so a hand that just came out of 39-to-59°F water doesn't have to close tight around anything to set a drink down safely.
A wet foot bumps it climbing out, a hand brushes it reaching for a towel — it resists tipping and settles back down instead of going over toward the water it's sitting next to.
The goods
Three reasons it settles in, cold or wet.
Holds on wherever the tub sits
The wide, low base bridges a curved rim, rides a wet deck board, or sits flat on concrete without a matching lip or ledge required. Rotomolded barrel, steel stock tank, or a bathtub full of bagged ice — it doesn't care which shape of plunge it's parked next to.
Grips the drink so your hands don't have to
Right after you step out, your hands are the clumsiest they'll be all day. The fins hold the container from the sides, so a bottle or thermos drops in without needing a tight grip, a twist, or a steady balance from fingers still catching up.
One piece, doesn't mind the cold or the wet
Solid flexible material with no clamp, no hinge, nothing to seize up going from a cold tub to a warm sauna and back. Splash, drip, or a full rinse afterward — none of it asks for babying.
Why more than one
Two identical thermoses. Whose is whose?
At a group polar plunge or a two-person sauna-and-plunge circuit, everyone seems to carry the same steel thermos — set down together on the same wet rail or dock, there's no way to tell whose is whose until someone reaches for the wrong one.
Build your set
Give everyone their own.
Pick a pack, then give each one a color — so nobody has to ask which drink is theirs.
Versus the fixes
None of the existing gear was built for two minutes in the cold.
| A hot tub clip-on cup holder | The Cold Plunge Cup Holder | |
|---|---|---|
| Fits a rigid barrel's rim | No matching wall lip to clip onto | Sits on the rim and settles in — no lip needed |
| On a soft-sided inflatable tub | The one wall shape it's actually built to clip onto | Sits alongside it just as well — nothing to clip |
| The moment it's actually built for | Sipping in the water on a warm, 20-minute soak | The two dry-land minutes before and after the dunk |
| Hands straight out of the cold | Clipping it on and off needs a working grip | Fins hold the drink steady — no tight grip needed |
| Moves rim to deck to sand | Clipped to one wall — stays there | Rides along — rim, deck, sand, dock |
| Deck space it takes | Clipped to the wall — none | Sits on the deck — small, but real |
| Cost | Another purchase, sized for a hot tub wall | One small piece, sized for this instead |
Built to clip onto a soft inflatable spa wall for a warm, twenty-plus-minute soak. A rotomolded barrel or a steel stock tank has no matching lip to clip onto, and the whole idea — sipping a drink while sitting in the water — doesn't apply to a two-to-five-minute cold dunk anyway.
Meant to bob on a warm, leisurely soak. Nobody wants a drink floating on 39-to-59°F water they're about to climb into, and a tip sends it straight into the plunge itself — a much smaller tub than a pool, with nowhere for a float to drift to.
These genuinely solve the wet-floor slip hazard at the entry point — that's exactly what they're built and marketed for. A drink set on top of one still has no dedicated spot; the mat manages the water, not the beverage sitting on it.
The default. On the tub's own rim it tips into the water it's balanced over; on wet decking it's on a slick board; on grass or sand it isn't level; in a shared recovery room it gets stepped on or picked up by someone else.
Fair questions
You're probably thinking…
Plain engineering language, not hype — a wide base and flexible fins, no magic claims. Molded in small runs in Orange, California, backed by a real 90-day guarantee instead of a sales page.
Said upfront, not hidden: yes, it sinks, it doesn't float — so it's built to live on the rim, the deck, or the ground next to the tub, never balanced out over the water itself.
Run the sticky-note test dry, at your own counter, before you ever get in. A 40 oz Stanley-style tumbler fits; an Owala 24 oz fits snug at the edge of the range. A Nalgene 32 oz wide-mouth runs past it and won't.
It's built around that exact moment. The container drops in from above and the fins do the holding — it resists tipping and settles back, no tight grip or twist required from hands still catching up.
Set against what the tub itself cost, it's a rounding error — free shipping on every order, and 90 days to actually run it through real plunges before deciding.
From the reviews
What buyers say.
Recent reviews of the Steadi, from every room and rig it lives in.
I have a tendency to spill my drinks and have two cats. This is one of the best things I’ve ever impulse bought. It works. It actually works. It’s a heavy, wide enough base that it is actually stable. My “spot” in the living room is near a somewhat-cushioned fabric ottoman, which is where I usually put my drinks. It’s
Dixie · 2026-08-30I love mine. I just wish the price was more appropriate. $15 seems a lot for a small plastic item. Reduce it to $9.99 and free shipping and I'll buy a few more!
Carolyn G. · 2026-08-27Excellent!
Brian S. · 2026-08-27Thank you for your service!
Brian S. · 2026-08-27It’s great love it
gilbert a. · 2026-08-24I never knock over my water at night anymore!
Customer · 2026-08-21All 119 reviews are for the drink base itself, collected across every place people use it.
Ninety days of real plunges.
Take it through a month of cold mornings. If it doesn't do what this page says — on the rim, the deck, the sand, with your cups — email hello@steadilabs.com and it gets made right. No forms, no fight.
Veteran-founded · Patent pending · Made in Orange, California
From
Made close to home, molded for the cold.
The maker is Steadi Labs, a small veteran-founded company in Orange, California. It's injection molded in small runs, and nothing about it travels far — the mold, the material, and the color runs all sit within about three and a half miles of the shop. The people who make it read hello@steadilabs.com themselves, often the same morning you're stepping out of the water.
Before you buy
Asked with hands still cold, answered here.
Does it float, or does it sink if it ends up in the plunge?
It sinks — worth knowing up front. Splash, drip, and a full rinse afterward are all completely fine; cold and wet don't bother the material. But if it actually goes into the tub, it goes to the bottom and stays there, so keep it on the deck or the rim, not hanging over the water.
Does it actually work on a barrel's curved rim, or a stock tank's edge?
That's the shape it's built to handle. The wide base bridges a curved or narrow rim instead of needing a flat inch to balance on, and the fins hold the drink so it isn't riding on balance alone. It works the same whether the tub is a rotomolded barrel, a galvanized stock tank, or a bathtub full of bagged ice.
My hands are basically useless for a minute after I get out — does that matter?
It's built around that exact moment. Stepping out of 39-to-59°F water measurably weakens grip for a few minutes, so the fins do the holding instead of your hand — set the container in from above and it resists tipping and holds steady on its own, no tight grip or twisted lid required.
Will my tumbler or thermos fit?
Measure the bottom, not the rim. A base 2 to 3 inches across settles in — the 40 oz Stanley-style tumbler and a standard vacuum thermos both do. A handled camp mug is the exception; the handle sits where a fin needs to grip.
Does it hold up on wet concrete or slick decking?
Yes — sealed concrete and composite decking are exactly the surfaces setup guides recommend around a home plunge, and both stay wet from splash through most of a session. The wide base and the grip on the drink itself work at least as well there as anywhere else around the tub.
I run a sauna-and-plunge circuit. Does it travel with me?
It's light enough to carry from station to station and doesn't clamp to anything, so there's nothing to unclip before you move. It rides the deck between rounds the same way it rides the rim — set the drink down, pick it up, go.
We do a group polar plunge every year — does this work for a crowd?
Each person's drink gets its own footprint instead of sharing one crowded patch of sand or dock. It sits flat on cold sand, a dock, or frozen ground without tipping the way a thermos balanced on its own does.
How do I clean it after a plunge?
Rinse it under the tap or wipe it down, or put it in the dishwasher. It's one piece of solid flexible material with no seams or hinges for grit or lake sand to hide in.
Who makes it, and where do I buy one?
It's called the Steadi, molded in small runs in Orange, California by Steadi Labs — veteran-founded and patent pending. Every order ships free from steadilabs.com, with 90 days to change your mind.
Give the drink a spot before the timer starts.
The drink is exactly where you left it — on the rim, the deck, or the sand — waiting for the hand that just came out of the water, no balancing required.
Ships free — settle it inCheckout is on steadilabs.com — Steadi Labs is the company that makes it.