Every question, answered.

Moving, uneven surfaces are exactly what the shape is for. The wide flexible base spreads across the deck carpet, the fins grip the container's bottom inch from the sides, and when a wake rolls through, the base flexes with the hull and settles the drink back level. It resists tipping — it doesn't repeal physics, and a boat running on pad is still a stow-it situation.

Stow it, same as everything else on deck. Nothing rides out a hole shot loose on a bass boat, and this doesn't claim to. It's for the hours you're fishing, not the minutes you're running — and it picks up in one grab when it's time to move.

No. No hole saw, no self-tappers in the gelcoat, no adhesive pad. Nothing attaches to the boat at all — it sits on the carpet or the hatch lid, moves to wherever you're standing, and goes home in the rod locker.

Yes — the 40 oz Stanley fits. The rule is the base: 2 to 3 inches across settles between the fins. Measure the bottom, not the rim. Handled thermos mugs are the exception that doesn't fit — the handle lands where a fin needs to grip.

Fair warning: it doesn't float. Soaking is fine — spray, rain, a dunk, a hose-down at the ramp — but if it goes over the gunwale, it goes to the bottom. Keep it on the deck, not the cap rail.

The base is wide and flexible, so it rides the give of the carpet instead of skating across the top, and the drink settles back when the hull rocks. A direct kick mid-hookset is still a direct kick — it resists tipping; it isn't bolted down.

That's the spill this deck is famous for — there are whole forum threads on getting coffee back out of marine carpet. This holds the cup steady so the drink is far less likely to go over in the first place. It's not a lid, though: for the ride out at safe light, a lidded travel tumbler is still the right pairing — this gives it somewhere to stand once you're fishing.

Yes — it works at least as well on hard, flat surfaces as on carpet. The wide footprint and the fin grip do the same job on a hatch lid, the console top, a dock table, or the tailgate at weigh-in.

Hose it off at the ramp or run it through the dishwasher. It's one piece of flexible molded material — nothing to corrode, no arms or springs to work loose.

It's called the Steadi, injection 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.

Those solve the diameter problem by asking for another bracket or holder bolted to the boat, sized to its own opening rather than your actual cup. This doesn't mount to anything — it sits on the carpet, a hatch lid, or the console top, and the fins grip a container by the bottom inch wherever you set it down, including the 40 oz-class tumblers a stock 3.5-inch console bore turns away.

Either. The marine carpet on an aluminum boat's casting deck behaves the same as it does on a fiberglass rig, and the hard surfaces on board — a hatch lid, the console top — get the same benefit hard, flat surfaces get anywhere else: the wide base and fin grip work at least as well on hard ground as on carpet. Hull material doesn't change what the base is doing underneath the drink.

No — it's a base, not a koozie. It holds whatever you set in it steady; an insulated tumbler or can does its own insulating. Pair it with a 30 to 40 oz insulated tumbler and the base's job is keeping that tumbler off its side in the sun, not keeping the drink itself cold.

There's nothing to take off — it was never attached. Toss it in a rod locker for the run home, leave it in a rigging bag, or just leave it sitting on the console; there's no mount to loosen and no adhesive residue to leave behind, so it can live in the boat between trips the same as a tackle box does.

Most anglers running the bow all day get by with one, moved between wherever they're standing — bow, console top, or a hatch lid on a break. A second one earns its keep on boats with a co-angler working the back deck, or for anyone who'd rather park one at the console alongside the factory holder instead of carrying one back and forth.

It's molded as a single flexible piece — no folding arm or hinge to work loose the way flip-out holders do under boat vibration, nothing to corrode. Hose it off at the ramp between trips and it's ready for the next one.

A practical one. Most anglers already know their console holder won't take a 40 oz tumbler and haven't found a fix that doesn't mean drilling the boat — this is useful the moment it's out of the box, with no installation to get right.

The floor is a 2-inch base and the ceiling is 3 inches, with the fins flexing to seat bases as wide as 3.15 inches for a snug fit — that range covers the Stanley 40 oz H2.0 FlowState Quencher (3.1-inch base) and the Stanley 30 oz H2.0 FlowState Quencher (3.15 inches). On the small end, a standard 12 oz can — 2.6 inches across industry-wide — sits well inside the floor; a slim seltzer can, closer to 2.26 inches, is nearer the loose edge, so it's worth a sticky-note check if you're unsure.