How it works
How a flexible base holds your drink on a cushion.
A coaster works on a table because a table is hard and flat. A cushion is neither. This is the shape that fixes that — and why your drink settles back level instead of leaning over when someone drops onto the couch beside you.
Jump to the three parts ↓Why a cushion tips a normal cup
Set a cup straight on a couch and it sinks. The narrow base pushes into the foam, the cushion dimples around it, and the whole thing leans toward whichever side gives first. The softer the couch, the worse it gets — and the moment anyone else sits down, the surface moves and the cup goes with it.
It isn't that you're careless. A flat-bottomed cup is built for a flat, hard surface, and a couch cushion is the opposite of that. The fix isn't a steadier hand. It's a different shape underneath the drink.
base / fins / rim · to scale
The mechanism
Three parts,
no moving parts.
Instead of one narrow point sinking into the foam, a wide, flexible base lies across the surface and distributes the weight over a much larger area. The cushion can't dimple around a single spot, so there's no side for the drink to lean toward.
Flexible fins rise from the base and hold your cup, can, or tumbler from the sides. They flex to the width of the base — cans and bottles slide on, cups and tumblers drop in from the top — so the drink doesn't rattle around or slip through.
Push it off level and the flex in the base absorbs the movement instead of passing it up to the drink. It gives, then it comes back. That return-to-level is the whole point — it resists tipping by moving with the couch, not against it.
The part people don't expect
It wobbles.
Then it settles.
A rigid holder fights the cushion — and rigid is exactly what tips when the surface underneath it shifts. This one doesn't fight. When the couch moves, the base flexes, spreads the load, and brings the drink back to level.
The clip near the top of the homepage is one continuous take on a regular couch cushion — a person drops onto the seat beside a full tumbler, it wobbles, and it settles. No cuts, no music. It's the same demo we do in person at shows.
Wobble-then-settle
Unedited single take
One piece, nothing to it
It's a single piece of flexible material — nothing to assemble, nothing to charge, nothing that comes apart. Rinse it, or run it through the dishwasher. Because it just sits on top of the cushion, there's nothing to install and nothing to undo when you move it to the other end of the couch, the bed, or a chair on the patio.
It resists tipping, settles back to level, and holds steady on a soft seat — the base flexes with the cushion instead of fighting it.
Where the shape works
Anywhere soft or slightly uneven. Couch cushions are what it's built for, but the same idea holds on a made bed, a thick rug, a camp chair, or a back seat. If a coaster would slide or sink, this is the shape that holds — as long as your drink's base measures about 2 to 3 inches across. Check whether your cup fits →
Now the easy part.
Pick a pack, give each one a color, and give everyone on the couch their own. Free shipping, always.
Get yours — from $24.95Checkout is on steadilabs.com — Steadi Labs is the company that makes it.