Every question, answered.

Yes — that's the whole reason it's shaped this way. The wide flexible base spans the lid's crown instead of standing on top of it, and the fins keep the drink from rattling loose when somebody bumps the lid or hops up to sit. Push it off level and it settles back.

It holds on gelcoat as well as anywhere else. It resists tipping through the vibration and the wakes: the base grips the drink by its bottom inch and settles back level after the hull rolls. A hard knock from real chop is still a hard knock, but the ordinary rock of a day on the water is exactly the job.

No. Nothing clamps, mounts, or attaches, anywhere. It sits on top of whatever surface is doing the work that hour and picks up in a second — which matters most right here, since the lid opens for ice again and again over the course of a day, and nothing should have to be unscrewed first.

That's the design brief, not an exception to it. Because nothing's attached, a drink standing on the lid lifts off in one hand before the T-latches even come free, and goes right back down once the lid's closed again.

Go by the bottom, not the rim. A base of 2 to 3 inches across fits — the 40 oz Stanley does, and so do standard cans, slim seltzers, and tallboys. Handled mugs don't: the handle lands where a fin needs to grip.

Yes — it holds at least as well on hard, flat, or ribbed surfaces as it does on the lid. The wide base bridges a tailgate's corrugation the same way it bridges a lid's crown, and the grip keeps a bumped drink from skating on a wobbly camp table.

Both are inside its range. In sand, the wide footprint spreads the load instead of sinking a point the way a narrow base does; beside a chair, it plants the drink at hand height instead of down in the grass at ankle level.

Hose it down, rinse it, or run it through the dishwasher. It's one piece of flexible molded material with nothing to come apart, and a soaking doesn't bother it.

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 change your mind.

There's no fixed number — it comes down to how many drinks are parked on the lid, the gunwale, or the tailgate at the same time. A crew running the cooler lid as a bar top for the afternoon usually keeps a couple going at once; someone fishing solo with one drink and a rod holder only needs the one riding along.

No. It doesn't float, and if it goes over the rail it sinks like anything else made of solid molded material. It isn't attached to the boat or the cooler in the first place, so the better habit is picking it up off the gunwale before real chop, the way you'd grab a phone or a hat. A dunking or a hose-down afterward doesn't bother it — it just won't float back up on its own.

With the koozie on — that's the shape actually riding on the lid. A bare 12 oz can runs about 2.6 inches across the base; foam adds width on top of that, and it's the koozied footprint that needs to land inside the fit window, not the can underneath it. Test it the way it actually rides, straw lid up too, before trusting the fit.

Because those recesses are sized for one thing: a bare can. Reviewers of coolers built this way, like Igloo's Trailmate line, report the molded-in holders take a standard can and stop there — a wider tumbler or a bottle just sits on the poly next to the holder instead of settling into anything. And the moment the lid swings open for ice, every one of those holders goes with it; nothing about a molded recess travels to the tailgate, the gunwale, or the ground once the lid's up.

That's an ordinary bump — a leash tangle, a missed cornhole toss catching the base, someone's knee against the cooler — and it resists tipping from exactly that kind of glancing hit. The fins grip the bottom inch, so a knock rocks the drink and it settles back rather than walking off the edge. A direct, hard hit can still take anything down; the design is for the bumps a tailgate lot and a campsite throw all day, not a collision.

No coating to break down, so the grip doesn't change with the weather — it's the same one-piece flexible material whether the lid just came out from under a tarp in July or straight off a fresh bag of ice. What actually changes the fit is the container's own base, not the temperature of the surface it's standing on.

It has fewer ways to fail than either. A suction cup's grip depends on a clean, smooth, dry seal — exactly what a boat rarely offers — and boat-forum threads keep returning to the same question of whether any of them hold up. A rail clamp or a drilled-in holder solves that by giving up portability: one holder, bolted to one fixed spot, for one drink. This is one piece of molded material with no seal to fail and nothing to unscrew, so a season of salt spray, sun, and ice melt is closer to a rinse than a wear test.

It comes down to the base, not the volume. The Quencher's 40 oz rides on a 3.1 inch base, inside the fins' flex range, which stretches to a snug 3.15 inches for a container that's a genuine push to seat. A growler's base runs past that flex ceiling entirely, so instead of a snug seat, there's nothing for the fins to grip. The same logic is why a slim 12 oz seltzer, at roughly 2.25 inches, sits closer to the floor of the range than a standard can at 2.6.

It travels well as one — it packs flat, has no parts to lose, and the color lineup was named for exactly this scene: Tailgate Red, Open Water, Sandbar, Clear Skies. Free shipping and a 30-day guarantee apply the same as any other order, so there's room to swap it if the color's wrong for their rig.