Every question, answered.

That's the terrain it's built for. The wide flexible base spreads across the dash or the table instead of balancing on a point, and the fins hold the drink by its bottom inch through vibration and braking. It resists tipping on a hard corner — it isn't a seatbelt, so a full drink still belongs in a holder, not loose on the seat.

No. Nothing attaches to the dash, the wall, or the dinette. It sits on top of whatever surface is in front of you and moves with you from the cockpit to the campsite.

Measure the bottom, not the rim. A base 2 to 3 inches across settles in — the 40 oz Stanley-style tumbler does. A handled mug doesn't; the handle sits where a fin needs to close.

No — the table's play is a leg-socket problem, not a drink problem, and this doesn't reach that far. What it does is hold the drink steady on top of a table that's still rocking, so the wobble stops being your cup's problem too.

Yes — on the picnic table, the camp chair armrest, or set straight on the ground. The wide footprint and the grip do the same job on gravel and grass that they do on the dash.

Same base, same answer. It doesn't need a flat, solid surface underneath — it spreads across whatever's there, slats and all, and settles the drink back when the table gets bumped.

For a lot of owners, yes — it becomes the cab's only real holder. Set it on the dash or wedge it into the console spot you already improvised, and it holds where nothing built-in ever did.

Rinse it or run it through the dishwasher between trips. It's one piece of flexible material with nothing to take apart.

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 send it back if it's not for you.

It shouldn't get the chance to. The fins grip the tumbler itself, not just the surface underneath, so a sweating cup stays gripped instead of sliding around and dragging a ring across the laminate. If moisture does collect on the base, it wipes off in one pass — it's one piece of solid material with nowhere for water to sit or seep in.

There's no socket, spring, or clamp inside it to work loose the way the dinette pedestal does — it's one piece of injection-molded material with no moving parts to fatigue. The vibration that loosens a bolted joint over a season of driving simply doesn't have a joint to work on here.

It's used outdoors on ice and packed snow, so ordinary cold weather isn't a problem for the material. There's no water line, seal, or hollow chamber inside it that a hard freeze could split — it's one solid piece of flexible material, not a component built around trapped water.

A sippy cup or straw cup with a base in the 2 to 3 inch range fits the same as any other container that size — the fins grip the bottom inch regardless of what's printed on the outside. A juice box doesn't have a round base to grip, so that one's still better held by hand.

Most owners end up with one per place they actually sit: one on the dash, one at the dinette, one for the sofa, and one that travels outside to the camp chair or the picnic table. Each stands on its own, so carrying one out to the campsite doesn't leave the dinette without one.

It solves a specific, recognizable annoyance — a cab with no factory holder, or a dinette nobody trusts with a full cup — which makes it an easy small gift for someone who wouldn't necessarily buy it for themselves. It ships free and is molded and packed in Orange, California.

Yes — it isn't mounted to anything, so it rides in the towed car the same way it rides in the coach: on the dash or console, wherever there's a flat spot. It comes along whenever the toad gets unhooked and driven on its own.

A magnetic system only holds a cup at the one spot where its matching metal coaster lives, and the coasters themselves are hand-wash only. This doesn't need a coaster or a magnet — it grips the container directly, so it works at the dash, the dinette, or the picnic table without a matched set of parts to carry between them.

Both, as long as the base lands in the 2 to 3 inch range — a real stemless glass and a wide-based silicone or stemless plastic wine cup grip the same way. Real glass is a bit of a rolling-home taboo for a lot of RVers, so the silicone version is the one that actually rides along on most rigs, and it fits just as well.