Every question, answered.

Yes — it doesn't try to squeeze into the factory well at all. Set it flat on the console or the seat beside you, and the base does the securing itself, so the tumbler that never seated right finally has somewhere to sit that doesn't care how wide it is.

Measure the base, not the rim or the flare above it. A base 2 to 3 inches across settles in — the 40 oz Stanley does, and so does a cold cup's tapered bottom. The 64 oz Quencher's base runs wider than that range.

This resists tipping and settles back when the cup gets bumped or reached past — that's the part it solves. It isn't insulation and won't stop a cup from sweating, so pair it with a sleeve if the sweat itself is what you're after.

On the stroller's own flat tray or parent console, yes. It isn't built to clamp around a round handlebar the way the aftermarket rings do, so there's no clamp on the bar to loosen or rotate over a curb cut.

On sand, the wide base rests on top instead of sinking the way a narrow cup does. On a lawn chair, set it on the armrest itself rather than wedging into the built-in holder that was sized for a narrower can.

No. Nothing clips to a handlebar, clamps to an armrest, or wedges into a console well. It holds the cup itself, so it moves with the coffee instead of staying behind with whatever it was mounted to.

Less of one. The wide base gives a tall, narrow-based cup its own steady footing, so a table that rocks on uneven pavement isn't compounding a second unstable shape on top of it.

Rinse it or run it through the dishwasher — one piece of flexible material, with no seams for spilled coffee or sugar to hide in.

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.

The same. The fins close around the outside of whatever container is sitting in them — they don't touch what's inside, so a paper cup of hot coffee on the way to a desk gets the same hold as an iced coffee's condensation-slicked cold cup or a can pulled straight from a cooler. Temperature doesn't enter into the grip either way.

It fits. Canned nitro cold brew typically comes in a slim 9.6-ounce format, and slim 12-ounce cans in that same body style run about 2.25 inches across the base — inside the 2 to 3 inch range that settles in fully. A standard 12-ounce can, at about 2.6 inches, sits comfortably in the same range from the other direction.

Rinse it under the tap or run it through the dishwasher. It's one piece of flexible material with no seams, hinges, or fabric for spilled syrup, creamer, or sugar to collect in — nothing to pick at with a toothpick the way a mesh chair pocket or a fabric stroller pouch needs.

No. The fins hold a container by closing around its shape rather than relying on dry friction alone, so a cup running with condensation seats the same way a dry one does. It's the same reason it comes straight out of the dishwasher ready to grip again, wet or not.

For the car alone, maybe not, if the factory well underneath is already deep and enclosed. What an expander doesn't do is come with the coffee once it's out of the car — it stays bolted to the console, so the same tumbler is back to balancing on its own base the moment it reaches the desk, the stroller tray, or the lawn chair.

One per spot is the simplest way to use it, since nothing follows you automatically the way a phone does. Set one down at each place the coffee actually lands and it's already there waiting instead of getting carried, forgotten, or left behind in the car — there's no mount tying it to any one of those places, so more than one just means more spots covered.

That's the one honest no. A handled mug's handle sits low on the body, right where a fin needs to close around the base, so it gets in the way even when the base itself is well within range. A mug or camp cup without a handle, sized within 2 to 3 inches, grips the same as any other container — it's specifically the handle that doesn't work, not the shape.

It's one piece of molded material with nothing mechanical inside it to fatigue — no spring tension like a cup holder expander's, which loosens as it ages, and no adhesive or suction seal to dry out the way a suction-cup holder's does. It rinses off or runs through the dishwasher the same way on day 300 as it does on day one.

It's a simple, unbranded-feeling object that answers a problem almost anyone with an iced coffee habit quietly works around — no batteries, no app, nothing to install in someone else's car or desk setup. It ships free, molded in Orange, California, with 30 days for them to decide it earns a permanent spot wherever their coffee actually goes.