Every question, answered.

That's the surface it's shaped for. Cushions here run four to six inches thick and slightly domed, so the wide flexible base spreads across the crown instead of balancing on top of it, and the fins keep the drink from rattling loose as the cushion re-shapes under you. It resists tipping — nothing bolts down.

Same idea. A crowned or rounded arm gives most add-on trays nothing flat to grip — this doesn't need flat. The base spans the curve, and the fins hold the drink by the bottom inch, condensation and all.

Wind gets under light, tall things — that's why the folding side table goes over in a gust. A drink gripped low and wide by its bottom inch gives a storm far less to work with than a bare glass standing alone. It resists tipping; a real gale is still a real gale, so when the umbrella comes down, bring the drinks in with it.

Yes. It's one piece of injection-molded flexible material — no metal to rust, no mesh to sag, nothing for weather to break down. Rain doesn't bother it; hose it off along with the cushions, or run it through the dishwasher after a sticky night.

Check the base, not the rim. A container base 2 to 3 inches across settles in — the 40 oz Stanley fits, and so does a stemless wine glass. Handled mugs don't; the handle lands right where a fin needs to grip.

No clamps, no wedges, no stakes, no adhesive. It sits on top of whatever the evening offers — cushion, arm, the gap between seats, the fire table — and moves with you when the circle re-forms around the flames.

Not to this. A wedge sized to one gap width stops working the moment somebody stands up; a base that simply sits on top of a cushion or in the gap doesn't care how wide it is that minute.

Yes — soft, uneven, moving ground is what this shape was built around. It spreads across turf the same way it spreads across a cushion, instead of balancing on one root or one lump.

A sugary spill left in a cushion or between deck boards is exactly what draws them — the outdoor version of a problem indoor couches don't have. Holding the drink steady in the first place is the fix; there's nothing left behind to soak in or attract anything.

Rinse it or run it through the dishwasher. It's one piece of flexible material with nothing to unscrew or come apart, even after a night of sunscreen and s'mores hands.

It's called the Steadi, molded in small runs in Orange, California by Steadi Labs. Every order ships free from steadilabs.com, with 30 days to change your mind.

A bare can's base sits inside the 2 to 3 inch range, but a foam koozie adds real thickness around it — usually enough to push the wrapped can's footprint past the 3.15-inch flex ceiling the fins can seat. Slide the koozie off before setting the can in, or expect a snugger seat than the can gets on its own.

Yes — the fins grip by the container's bottom inch regardless of what's inside it, so a lidded tumbler of coffee or cocoa gets the same hold as a cold can. Check the base the same way you would for anything else: 2 to 3 inches settles in, and the fins flex to seat a slightly wider base too, as large as 3.15 inches.

A direct hit from a large dog at a run can move almost anything; nothing sitting loose on a cushion or the deck is immune to that. What it's built for is the smaller, constant stuff — a passing leg brushing it, a nose checking out what's in the cup, the general commotion of a dog circling a fire pit all evening. The wide base and the fins gripping the bottom inch mean it resists tipping through all of that in a way a can standing alone in the grass doesn't.

It's a practical one — it solves a problem that shows up the first week any new outdoor furniture gets used, not a novelty that gets set aside. It doesn't need to match a specific arm width or cushion color, and it works before the new owner has even figured out where their coffee table goes in the new layout.

One per drink in play is the simple rule; most households start with one per regular seat and add more for entertaining. Nothing about it is fixed to one spot, so extras move as easily from the sofa to a folding chair pulled up to the fire as the first one does, and there's no minimum arm width or gap size limiting where each one can go.

Probably not for those specific chairs — a genuinely flat, wide Adirondack arm is one of the few outdoor surfaces built to hold a drink on its own. It earns its keep on everything else in the circle: the sofa cushions, the wicker set, the folding chairs, and any seat that isn't an Adirondack, which on most patios is most of the seating.

Either works. It's one piece of solid, flexible material — no metal seams to corrode, no fabric to trap moisture — so it skips the seasonal care outdoor cushions need. Toss it in the bin with everything else, or leave it out all winter; both are fine.

No — there's nothing porous for wine, or anything else, to soak into. It's solid material top to bottom, so a spill sits on the surface instead of settling into a weave or a foam core the way it would on the cushion underneath. Rinse it or run it through the dishwasher and it's done; no blotting, no stain treatment, no waiting to see if it set.