Every question, answered.

That's the surface it's built for. Carpet gives a narrow base nothing to grip, so the wide flexible footprint spreads across the pile instead of tipping on it, and the fins keep the can or bottle from walking loose when the deck rocks. Push it off level and it settles back.

Understandable — a beam wake is exactly what sends a gunwale-side drink into the lake. This resists tipping and settles back when the hull rolls; it's not a life jacket for your cup, so a direct hit still gets through, but a passing wake is what it's built to shrug off.

Measure the bottom, not the top or the koozie. A base of 2 to 3 inches across fits — the 40 oz Stanley does, and so does a standard can. Handled travel mugs don't; the handle gets in the way of the fins.

No. Nothing clamps to a rail, screws into the gelcoat, or gets glued down. It sits on top of whatever surface is free and moves with you from the bow to the cooler.

All of them — carpet, aluminum, fiberglass, textured nonskid. The wide base and the grip don't need a smooth surface or a factory hole to work from.

Yes — it holds at least as well on hard, flat surfaces as it does on carpet. Worth having there too, since wind alone can walk a light bottle off a sloped dash on plane.

That's the run that empties the cooler onto the deck in most boats. The fins hold the drink through the vibration and the chop, and the flexible base rides the hull's motion instead of bouncing with it.

Like anything else, it sinks — it isn't a flotation device. The whole point is keeping the drink from going over the side in the first place, not fishing it back out after.

Rinse off the salt spray and sunscreen, or run it through the dishwasher. It's one piece of flexible material with nothing to come apart or trap 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 change your mind.

Yes. The same wide base and fin grip that work on marine carpet and aluminum hold just as well on gelcoat, fiberglass, and the smooth decking most pontoons and bay boats use — hard, flat surfaces are the easier case, not a special one. It moves from the casting deck to the helm to a cooler lid on any hull.

A Yeti Rambler 20 or 30 oz tumbler has a base right around 2.75 inches, solidly inside the 2 to 3 inch range — same territory as the Stanley 40 oz at roughly 3.1 inches. What matters is the base measurement, not the brand or the ounces printed on the side.

No. A slim 12 oz can runs about 2.25 to 2.3 inches across the base, just inside the floor of the 2 to 3 inch range, so the fins get real contact. What makes a slim can rattle in a factory holder is the holder — sized for a full-width can — not the can's own base.

It moves with whoever's using it, so a boat with one holder can shift it from the bow to the console to the cooler as the day goes. With two or three people actually holding rods at once, though, most boats end up wanting one per angler rather than passing a single one around.

No. There's no hardware, no adhesive, and no clamp involved — it's a single piece of flexible material that rests on the surface under its own grip, the way a rubber mat would, not something fastened or pressed down hard enough to mark gelcoat or paint.

It answers a problem almost every angler already has and no boat came with a real fix for, which makes it a useful gift rather than a novelty one — nothing to rig, drill, or install before it's useful on the next trip out.

Yes, as long as it doesn't have a handle. A travel mug or thermos without one sits and grips the same as a can or bottle; a handle lands right where a fin needs to reach the base, which is why handled mugs are the one honest non-fit on the container list.

There's no metal to corrode and no seams for salt or grit to collect in — it's one piece of material, so what wears over years of use is the surface itself, not fasteners or hardware failing first. A rinse after each trip is the only upkeep it asks for.