Every question, answered.

That's exactly the surface it's built for. The wide, low base spreads its grip across whatever tilt the pad gave the table, and the fins keep a can or tumbler from riding that tilt off the edge. Bump the table and it settles back.

The suspension bounce is exactly the kind of movement this resists — the base's low, wide weight rocks with it and lets the drink settle back down. It's not magic: a hard direct knock is still a hard direct knock, but the trailer's normal sway while parked is what it's built to shrug off.

The armrest sling was sized for a can, not a 40 oz tumbler, and this doesn't try to wedge into it. Set it on the ground beside the chair or across a flat armrest instead; the wide base resists tipping where an unguarded can or tumbler would just go over in the grass.

Yes, and it works at least as well on the dinette's hard tabletop as it does on a folding cushion. The same wide base and fin grip that handle the picnic table's tilt handle the dinette's wobble and the jackknife's soft cushion too.

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

No. Nothing screws into the dinette, clamps to a chair frame, or sticks to the wall. RV interior walls are thin paneling that owners already avoid drilling into for exactly this reason — this just sits on top of whatever surface is in front of it.

No — nothing stays put at highway speed, and this isn't an exception. Treat it like every other loose item on the pre-departure walkaround: stow it in a drawer or the pass-through before you pull out, and set it back down once you're parked.

Yes — it doesn't care about hookups. It responds to the ground and the furniture under it, not the site's amenities, so a bare boondocking pad gets the same grip as a paved space at a full-hookup park.

Rinse it at the campsite spigot, or wipe it down back home, or put it in the dishwasher. It's one piece of flexible material with nothing to take apart or lose in the grass.

It's called the Steadi, molded in small runs in Orange, California by Steadi Labs. Every order ships free from steadilabs.com, with 90 days to change your mind.

It works the same either way. Nothing about it mounts to the trailer, so it doesn't care whether the rig is a bumper-pull ('TT' in RV-forum shorthand) or a fifth wheel ('fiver') hitched over the truck bed — both typically have the same style booth dinette, single-pedestal table, and suspension bounce while parked. If there's a flat spot for it to sit — table, bench, or floor — it works the way it does in any travel trailer.

No — it isn't built to nest inside a recess, and it doesn't need to be. The factory recesses in a lot of RV dinettes are the problem in the first place: often too shallow and narrow for a modern tumbler, which is why some owners resort to wedging a stadium cup inside just to make one usable. This sits on the flat tabletop next to the recess instead, so it works whether or not your dinette has a built-in holder at all.

Keep it back from direct flame the way you would any piece of molded plastic camp gear — it isn't rated for open-fire heat. It's built for the temperatures a drink actually sits in around camp: on the chair, the table, or the dinette. Right next to the fire itself isn't that.

There's no lab number to quote on years of use, but the structural comparison is straightforward: it's one solid piece of molded material, with no mesh sling to stretch out and no clamp screws to strip or back out on washboard roads. The mesh holder and the clip-on both have moving parts and the failure points reviewers already describe; this doesn't have the equivalent parts to fail the same way.

It's a reasonable one — the dinette-has-no-cup-holder complaint is one of the first things new trailer owners find themselves searching for, and this doesn't require knowing their trailer's make or model, since nothing about it mounts or drills in. It works the same in a brand-new travel trailer as it does in one that's been to a hundred campgrounds.

Buy for how many drinks are usually out at once rather than one per person. Two campers circulating between the picnic table, the chairs, and the dinette often only need one or two moving with them. A full booth of grandkids at the dinette is the case forum parents specifically ask about, since factory dinettes often have zero cup holders built in — that's where having one per seat matters most.

Most sippy cup bases fall well inside the 2 to 3 inch range that settles in fully. Bases vary by brand, so the fastest check is the same sticky-note test used for a tumbler: stand it on a 3-inch square sticky note before the trip — if the base sits inside the square, it fits the dinette, the picnic table, or the chair the same way an adult's drink does.

Yes, as long as the mug is handle-less — a lidded travel mug without a handle fits the same 2 to 3 inch base range as everything else on this page. That step is otherwise one of the least stable spots at camp: no flat shelf built in, and the trailer often still settling on its jacks in the early morning quiet.