Finally, somewhere to put your drink on the deck.
4.9 from 119 Steadi reviewsA flexible-finned base that holds your can, seltzer, or tumbler steady on the rail cap, the Adirondack arm, or the boards underfoot. Nothing to drill, nothing to clamp — it settles back instead of going over.
Get yours for the deck — from $14.95No clamps, no screws into the railing — it just sits down and holds. Free shipping, 90 days to prove it on your own rail.
Will your can fit the rail cap? A sticky note answers it — the test is below ↓
Been there
This has already happened on your deck.
The beer went on the rail cap because there was nowhere else. The turn back from handing off a burger swings an elbow straight through where the can was standing, and it's already two feet down in the mulch.
The seat rakes back so far that standing means pushing off both arms — including the one the drink is sitting on.
The cooler lid has quietly become the drinks table for three people. It swings open on its hinge, and everything on top goes with it.
The seltzer left on the rail cap is the lightest thing on the highest, most exposed surface on the deck. The gust that stirs the string lights takes it with them.
The status quo
Out back, every flat spot already has a job.
Sit down on a deck and the drink needs somewhere to go — and the deck wasn't built with that in mind. Here's where it actually ends up.
Code puts the top rail at least 36 inches up — 42 in California — and a standard cap measures about 5.5 inches wide, often crowned to shed rain instead of sitting flat. It's the highest, most exposed shelf on the whole deck, and half the landing zone off the top of it is the yard, the flowerbed, or a second-story drop.
When the chairs have no arm wide enough, the boards are the only surface left — right at ankle height, in the walking lane, laid with drainage gaps that swallow anything that goes over.
Flat, waist-high, always within reach — and hinged. Every refill swings it open, and whatever was parked on top rides along with it.
Wide enough to read like a built-in side table, which is exactly the problem: it's also the board both palms push against to get out of a chair that slopes that far back.
Cranking the umbrella through its center hole shakes the whole tabletop, and a slatted or mesh top gives a can's narrow base nothing solid to stand on to begin with.
None of it ruins the cookout. It's a decision you make each time you sit down out here — rail, arm, boards, or hold it — and there's no seat on the deck that skips it.
The fit test
Skip the tape measure — grab a sticky note.
lands in here
A square sticky note: 3 inches, exactly — same as the ceiling of what fits, rail or boards.
The standard 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.
The rail cap, the cooler lid, the armrest — wherever it's headed on the deck. Look at the base, not the rim; tumblers taper and cans flare at the top.
Base sits inside the square? It fits. Hangs over the edge? Too wide. A small puck lost in the middle — under 2 inches? Too narrow.
No tape measure at the hardware store, no guessing before the cookout starts — one sticky note, one glance, with the can or tumbler you actually bring outside.
Fit verdicts
The bottom inch decides what stays on the rail.
The rule is one line: a container base 2 to 3 inches across settles in. Everything below follows from it.
- Standard 12 oz can fits
- Slim seltzer can fits
- 40 oz Stanley-style tumbler fits
- 20-30 oz insulated tumbler fits
- Glass beer bottle fits
- Stemless wine glass fits
- Pint glass fits
- Kids' straw cup fits
- Koozie'd can too wide
- Coffee mug, handled handle in the way
- Shot glass too narrow
There's a floor as well as a ceiling: under 2 inches sits too loose, and a koozie can push a can's base past the top of the range instead of just around it. The handled mug is the honest exception on this list — the base fits, but the handle lands where a fin needs to grip.
The full fit database — Stanley, Red Bull, Yeti, and 30 more, with sourced base measurements →
Why more than one
Two identical cans off the cooler. Whose is whose?
Everyone at the cookout is usually drinking the same brand out of the same cooler, so two condensation-beaded cans look identical within a few minutes of standing side by side. Somebody ends up guessing which one's theirs, or grabbing the wrong can once the labels go cold and wet.
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.
The pitch, honestly
Three reasons it holds where the deck won't.
Steady on the rail, the arm, or the boards
The wide, low base spans a narrow rail cap or bridges a board gap instead of tipping into it. It works at least as well on hard, uneven surfaces as it does on anything soft — a deck is exactly its terrain.
Grips what you actually bring outside
The can, the seltzer, the 40 oz tumbler, the stemless wine glass — cans and bottles slide on, cups and tumblers drop in through the fins and get held by the bottom inch.
Nothing to mount, nothing to lose
No clamp on the railing, no screws into the composite, no dedicated spot. Pick it up off the rail cap and set it on the armrest, the cooler lid, or the step — it moves with the party.
Under the hood
Built for a ledge too narrow to trust.
A rail cap is a few inches wide and deck boards are laid with drainage gaps between them — both too narrow or too broken up for a can to stand on alone. The wide, low base bridges either one instead of teetering on it.
Flexible fins hold the drink by its bottom inch, so a bump or a gust can't walk it sideways off the edge.
An elbow catches it reaching for the tongs, a gust moves through, someone brushes past on the way to the cooler — the wide base keeps its weight low, so it rocks and brings the drink back level instead of over.
Compared to the workarounds
You've probably already tried fixing the railing.
| A clamp-on rail cup holder | The Deck Cup Holder | |
|---|---|---|
| Fits a composite or aluminum rail | Grips a flat 2x6, slips on a contoured cap | Sits on any rail profile, flat or crowned |
| Holding a 40 oz tumbler | Ring's sized for a 12 oz can | Base settles in, tumbler included |
| Working the boards, the arm, the lid | Bolted to one spot, can't follow you there | Sits on the boards, the arm, the lid too |
| Setup | Screw-mount puts holes in the railing | Sits down, nothing to drill |
| Staying put once you walk away | Clamped on — still there when you're back | Portable, but leave it and it's gone |
| A season of sun, rain, freeze-thaw | Clamp hardware works loose over time | One piece, nothing to work loose |
| Cost | Another purchase, sized for one rail | One small piece, works anywhere you sit |
Built for one profile — a flat wood 2x4 or 2x6 — so a contoured composite or aluminum cap defeats the clamp outright. The ring is sized to a 12 oz can, so a 30 or 40 oz tumbler never fits, and the screw-mount versions put permanent holes in the railing.
The maker's own instructions call for a smooth surface to seal against — which a deck almost never has. Wood grain, embossed composite texture, and everyday dust break the seal, and it only ever holds the one can stuck to it.
It rocks on gapped, uneven boards, it's light enough for the wind to relocate on its own, it eats floor space on a small deck, and it's one more thing to carry into the garage before winter.
Carpentry aimed straight at the problem, and it still only flattens the ledge — the drink is still on the narrowest, windiest, most elbow-trafficked edge of the deck, one knock from a total loss.
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.
Honest answers
Asked mid-cookout, answered here.
Does it actually work on a railing?
That's the whole reason it's shaped this way. The wide, low base spans a rail cap that's only a few inches across, and the fins keep the can or tumbler from walking sideways when an elbow catches it or the wind picks up. Bump it and it settles back instead of going over.
Won't wind just take it off the rail?
Wind is exactly what a bare rail cap can't defend against on its own — it's the highest, most exposed ledge on the deck. The wide base and the fin grip hold the drink steady against a gust; it resists tipping, it's not weightless magic, so a direct hard shove off the edge is still a direct hard shove.
Will my tumbler fit?
Measure the bottom, not the rim. A base 2 to 3 inches across settles in — the 40 oz Stanley does. A koozie can push a can past that range, and handled mugs don't fit at all; the handle gets in the way of the fins.
Does it attach to the railing?
No. Nothing clamps to the cap, nothing screws into the composite or the wood. It sits on top, works on any rail profile, and comes with you when you move to a chair.
Does it work on the deck boards, not just the rail?
Yes — hard, flat, and uneven surfaces are where it holds steadiest. The same base that bridges a rail cap bridges a board gap the same way.
What about the cooler lid or the patio table?
Both work. The wide footprint and the grip are what keep a bumped drink from sliding off a hinge or an umbrella-shaken tabletop — set it anywhere flat-ish and it holds.
Kids are on the deck all summer — does it work for their cups?
A straw cup or sippy cup within the base range settles in the same as a can does. It's not a lid or a seal, so it holds the cup steady — it doesn't replace one with a lid.
How do I clean it?
Rinse it off or wipe it down, or put it in the dishwasher. It's one piece of flexible material with nothing to unscrew or take apart.
Who makes it, and where do I buy one?
It's called the Steadi, molded in small runs in Orange, California by Steadi Labs. Every order ships free from steadilabs.com, with 90 days to change your mind.
Origin
Molded a few miles from the nearest rail cap.
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, usually before the grill's lit.
Ninety days on the deck.
Take it through a month of cookouts. If it doesn't do what this page says — on the rail, the boards, or wherever you set it down — email hello@steadilabs.com and it gets made right. No forms, no fight.
Veteran-founded · Patent pending · Made in Orange, California
Keep the drink off the railing.
The can stays on the rail, the seltzer stays on the arm, and nothing goes over the edge into the yard or through the gaps in the boards.
Shop now — free shippingCheckout is on steadilabs.com — Steadi Labs is the company that makes it.