Every question, answered.

That's the scenario it's built around. The wide base keeps the cup from tipping toward the keyboard in the first place, so it holds steady in the exact spot most likely to end in a support-forum thread about drying out a laptop.

Yes — hard, moving surfaces are within what it's built for. The wide base and the fins keep a cup from rocking loose with a hard brake or a turn, which is exactly where a factory cupholder sized for a can tends to let a cup down.

Yes — it holds steady on hard, flat surfaces at least as well as anywhere else, and a cluttered nightstand is exactly where that matters. It also frees up room for the water glass and the phone charger fighting over the same few inches.

That's the terrain it was designed to handle. The base doesn't need a level surface to work from; it flexes with whatever's underneath, whether that's a wobbling folding table, a cooler lid, or bare dirt.

Measure the bottom, not the rim. A base 2 to 3 inches across settles in — the 40 oz Stanley does. Handled mugs don't: the handle lands exactly where a fin needs to close, so it's built for tumblers, to-go cups, and handle-less camp cups instead.

Those grips work on a flat, non-porous surface and stop working on a textured or angled one — car dashboards and popcorn-textured surfaces are explicitly where the leading version says, by its own product description, that its grip fails. This isn't limited to one kind of surface, so it covers the car and the outdoors, exactly where that kind of grip runs out.

No. Nothing clamps to a desk edge, wedges into a console, or attaches to anything. It sits on top of whatever surface is there and moves with you when you get up.

Rinse it or run it through the dishwasher. It's one piece of flexible material with no parts to come apart or trap old coffee.

Not well, and it's worth saying plainly: the base would fit most handled mugs, but the handle sits exactly where a fin needs to close around the cup. It's built for tumblers, to-go cups, and handle-less mugs instead.

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 change your mind.

A clamp-on holder is a genuine fix for exactly one desk — most need a desktop edge somewhere between about half an inch and two and a half inches thick, and top out around 3.6 inches of cup diameter, so it has to be installed on that edge and left there. This doesn't clamp to anything. It sits on top of whatever surface is under it — desk, console, nightstand, or campsite table — and moves with the cup instead of staying behind.

Yes. The fins hold the outside of the cup, not the liquid inside it, so heat exposure is about the same as setting a hot cup on any tabletop. It doesn't trap or reflect heat back at the cup; it just grips the bottom inch and lets the cup do what it already does.

It's one piece of flexible material, molded as a single piece with no clamp, spring, or hinge inside it to loosen. There's no mechanism built in that's designed to work itself loose the way a clamp or a spring-loaded grip can over time.

No. It's a single piece of non-porous flexible material, not wood, so nothing soaks in the way a coffee ring or a heat mark sets into an unfinished desktop. A rinse or a run through the dishwasher clears it — no iron-and-cloth trick or wood bleach required.

It's not a replacement for a favorite cup or tumbler — it gives whatever cup someone already reaches for somewhere steady to land on the desk, the car console, or the nightstand. For someone who already has the cup they like, that's often the part still missing.

Yes, and that's a common way people use it. There's no installation step for either one, so leaving one at a desk or in a console and moving another between the nightstand and the campsite table doesn't take any extra setup.

It fits. A disposable to-go cup tapers to a base narrower than its sleeved middle, but that base typically lands inside the working range, and the fins grip below the sleeve at the cup's actual bottom inch.

Most do. Screw-lid keep cups are generally straight-walled and close to a tumbler's proportions at the base, so they settle the same way a travel tumbler does. Measure the base the same way you would any cup — about 2 to 3 inches across.

Both sit near the outer edge of what the fins accept rather than comfortably in the middle of the range. The Stanley 30 oz H2.0 FlowState Quencher measures 3.15 inches at the base, and the Owala FreeSip 24 oz measures 3.12 inches — both above the fully-guaranteed 3-inch ceiling, but inside the range the fins flex out to. Expect a snug seat that takes a small push, closer to the 40 oz Stanley's 3.1 inches than to a narrower everyday tumbler.