Every question, answered.

That's the whole reason it's shaped this way. Soft surfaces swallow narrow bases; the wide flexible footprint spreads across the mattress or duvet instead of sinking in, and the fins keep the drink from rattling loose when the bed moves. Push it off level and it settles back.

Understandable: foam holds moisture for days once it soaks. This resists tipping — it holds the drink steady and settles back when bumped. It's not a sealed cup, so pair it with a lidded bottle at night if you want both layers.

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

No. Nothing tucks under the mattress, clamps to the frame, or sticks to anything. It sits on top, works on either side of any bed, and stows flat in a drawer.

Both — that's the point. The wall side that never had a surface gets one, and the nightstand side gets its table back for the phone and the lamp.

Yes — it works at least as well on hard, flat surfaces. The wide footprint and the grip keep a bumped drink from sliding or going over, which is worth having on a crowded nightstand too.

Movement is the whole design brief. The base flexes with the mattress and settles the drink back level when the surface shifts. It resists tipping — it's not magic, so a direct hard kick is still a direct hard kick — but someone rolling over nearby is exactly what it's built to shrug off.

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

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. It's not attached to the bed frame or sized to a specific mattress height, so altitude doesn't matter — it sits on top of the mattress or duvet the same way whether that's a low platform bed or a loft bed several feet up, and it packs flat for a dorm bunk as easily as a bedroom.

No — the flexible fins grip the drink itself, not just the surface underneath, so a sweating glass doesn't loosen the hold. If moisture pools on the base, wipe it down; it's one piece of solid material with nowhere for water to seep into.

No — that's the point of keeping the spill up here instead of down in the bedding. Memory foam can start growing mold or mildew within 24 to 48 hours if a spill soaks in and stays trapped, and damp down can mildew and clump permanently. This is one solid piece of flexible material with nowhere for liquid to soak in; wipe it or rinse it and it's done.

Yes. Nothing limits it to one at a time; use one per drink, or one on each side of the bed for two sleepers. Each stands on its own base and doesn't need the others moved to make room.

A straw cup with a base in the 2 to 3 inch range fits the same as any other cup that size — the fins grip the bottom inch regardless of what's printed on it. Anything closer to espresso-cup size is too narrow to seat.

It solves a specific, recognizable annoyance — the side of the bed with no table, or the water glass that gets knocked over in the dark — which makes it an easy small gift for someone who wouldn't buy it for themselves. It ships free, molded and packed in Orange, California, in colors that read as bedroom, not gadget.

The caddy is only as strong as the mattress's own weight holding it in place, which is why owners report a full water bottle pulling the whole thing loose and onto the floor. This doesn't tuck under anything or depend on mattress weight — it sits on top and grips the drink from the base up, so there's nothing to pull loose.

There's nothing in it built to fatigue the way a spring or a clamp does — it's one piece of injection-molded material with no moving parts to loosen. Rinse it the same way you'd rinse a dish; there's no coating to wear off and no separate parts to come apart.