Every question, answered.

That's the specific case it's built for. The wide flexible base spreads across non-skid or gelcoat instead of balancing on one point, and the fins hold the can, cup, or tumbler by its bottom inch so a tack or a gust can't walk it loose. Push it off level and it settles back.

Understandable — a beam wake or a hard heel is exactly what sends a coaming-side drink into the water. This resists tipping and settles back when the boat rolls; it's not a harness for your cup, so a full knockdown still gets through, but the ordinary heel of a sail is what it's built to shrug off.

Yes — it sinks, the same as anything else that goes over without a hand on it. It isn't a flotation device; the point is keeping the drink from reaching the rail in the first place, not fishing the holder back out after.

Measure the bottom, not the rim or the koozie. A base of 2 to 3 inches across fits — the 40 oz Stanley does, and so does a standard can. Handled mugs don't; the handle sits exactly where a fin needs to close around the base.

No. Nothing clamps to a rail, bolts through the coaming, or hooks over the lifelines. It sits on top of whatever surface is free and moves with you around the cockpit in a second.

All the ones you've got — non-skid fiberglass, gelcoat, a cushion, even the companionway steps. The wide base and the grip don't need a smooth surface or a factory-drilled hole to work from.

Yes — it holds at least as well on hard, flat surfaces as it does on a heeling cockpit seat. Worth having belowdecks too, since a beam sea can knock a drink off the counter just as easily as a wave on deck.

Sitting still doesn't mean level — the deck is cambered to shed water, and a passing wake in a rolly anchorage is enough to send an unheld drink over. The base settles back through that roll the same way it does under sail.

Rinse it at the dock or run it through the dishwasher. It's one piece of flexible material with nothing to come apart or trap salt water.

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 30 days to see if it earns a permanent spot in the cockpit locker.

Salt and sun don't have much to work on. It's one piece of flexible molded material with no metal fittings, hinges, or seams — nothing for salt to corrode or grit to collect in the way it does in a rail-mount holder's bushings or a clamp's hardware. Rinse it at the dock with the rest of the boat and it's ready for the next sail.

Depends what you want the recess to hold. Owners of boats with molded-in cockpit table wells describe them as too shallow and too wide for most drinkware — workable for one specialty rubberized tumbler shaped to fit, and even that can slide out once the boat heels, since the table has no raised fiddle to stop it. This isn't limited to the table, either — it sits on the bench, the sole, the coaming, or the cabin top at anchor, wherever the built-in recess isn't.

That's the standard marine holder ring working as designed — about 3.5 inches inside, sized for a can or a can in a koozie, which is why a slimmer bottle rattles loose in it and a wider tumbler won't go in at all. This works differently: the fins close around a container's bottom inch instead of asking it to match one fixed bore, so a 12 oz can — about 2.6 inches at the base, industry-standard — and a Stanley 40 oz H2.0 FlowState Quencher — 3.1 inches — both settle in the same base.

Most cruising crews find one per person aboard covers a normal watch rotation — one at the helm, one on the rail, one belowdecks at the nav station. A couple daysailing usually does fine with two or three moving around the cockpit as the afternoon goes on; a boat that regularly hosts sundowners for a full crew tends to end up with one per cockpit seat.

A practical one. There's no drilling, no measuring a rail or a pedestal, and no guessing whether it'll fit whatever holder bore the boat already has. It's useful the moment it's out of the box, on a boat that already has everything else.

Multihulls heel far less than a monohull under sail, so the tack-and-gust side of the problem is smaller aboard a catamaran or trimaran. The rest of it isn't: the deck is still cambered to shed water, the bench and cockpit sole are still finished in non-skid, and a wake at anchor still rolls a multihull the same way it rolls a monohull. The base works the same way on either hull — it grips the surface you actually have, heeled over or flat.

It's built around a container's base, and a stemmed glass's actual contact point is the foot of the stem — usually narrower than what the fins are built to grip. A stemless wine cup, the sundowner glass most cockpits have already switched to, is the shape this holds best. If stemmed glassware is a fixture aboard, decanting into a stemless cup before it comes up the companionway is the more reliable move.

Nowhere in particular, because there's nothing to unmount. Toss it in the cockpit locker, a cushion bag, or leave it sitting on a seat between outings — there's no bracket to unbolt and no suction seal to peel off and store separately.