Every question, answered.

That's the whole reason it's shaped this way. A narrow base leans the second the ground tilts; the wide flexible footprint spreads across pitched turf or a blanket instead of sinking into one spot, and the fins keep a lidless tallboy from rattling loose when the ground shifts. Bump it off level and it settles back.

It is the riskiest setup on the lawn, which is exactly the case this was built for. This resists tipping and settles back when the cooler lid gets bumped or a neighbor sits down close — it's not a sealed cup, so a stemmed glass is still a stemmed glass, but it's no longer standing on grass alone.

Measure the bottom, not the rim. A base 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 — and that matters, because some venues ban ground stakes outright. Nothing pushes into the turf, clamps to a chair, or depends on soft soil. It sits on top of the grass or the blanket and works the same on packed, sun-baked ground.

Both, and on a hard pavilion seat or folding table too. The wide footprint and the grip do the same job whether the surface underneath is fabric, turf, or something solid.

The base stays put on the ground where you left it — it doesn't ride in a pocket or a hand, so there's nothing to drop when a few thousand people stand up around you at once.

Rinse it or run it through the dishwasher. It's one piece of flexible material with nothing to come apart, and nothing that holds onto grass or dirt.

Yes. It's one flat, flexible piece with no legs, poles, or hardware — it goes in with the blanket and takes up about the same room as a folded koozie.

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.

One per drink in play covers it, but most blankets of four to six people land on two or three — one for whoever's holding the spot while the rest do the beer run, one for the cooler lid at BYO-picnic shows, and a spare for whoever brought the good glass. They pack flat, so a couple more barely change what's in the bag.

The 20 oz and 30 oz Yeti Rambler tumblers both have a documented 2.75-inch base, solidly inside the 2 to 3 inch range, and seat with room to spare. A 32 oz Hydro Flask Wide Mouth is a different case: its base runs about 3.58 inches, past even the fins' 3.15-inch flex ceiling, so that one's an honest no. Measure off the bottom, not the ounces printed on the side — two tumblers from the same brand can land on opposite sides of the line.

A slim 12 oz seltzer can runs about 2.26 inches at the base, and a standard 12 oz can — Coke, La Croix, most domestic beer — runs 2.6 inches; both sit inside the range and settle in. A koozie changes the math: the foam sleeve adds enough bulk to push most cans past what the fins can seat, so if you're running one, slide it off before the can goes in.

No. The fins grip the sides of the container by its bottom inch, not by relying on a dry surface, so a sweating tumbler is held the same way a dry one is. What actually matters is shape, not moisture: a lidded tumbler with a wide, straight base is the easy case, while a bottle that tapers sharply near the bottom gives the fins less to hold onto regardless of how wet it is.

It's not tethered to anything — it's a wide, flexible base sitting on top of the blanket or the grass, held there by its own footprint and whatever's standing in it. That's an advantage most of the night: nothing to unclip, nothing to catch on a foot passing by. It does mean the base doesn't automatically fold up with the blanket, so grab it separately when the show ends.

It's one piece of molded material, not an assembly of parts — no mesh to stretch out the way a chair's cup pocket does, no fabric to fray, no hinge to loosen. What ages with a season of use is dirt and drink residue, not the material itself, and that rinses off or comes out in the dishwasher between shows.

It answers a problem anyone who's spent a summer on a lawn already recognizes on sight, which makes it an easy one to give without much explaining. It ships free and packs flat enough to go in with whatever else is already headed to the venue.

It's one piece of solid-colored molded material, not a painted or coated finish, so there's no surface layer to chip or peel and expose a different color underneath. Grass and spilled wine rinse off or come out in the dishwasher — there's no fabric or mesh here to hold onto a stain the way a chair's armrest pocket would.

It's neither a stake nor a chair, so it doesn't fall under the rules written for those two categories. Venues like Ravinia that ban anything requiring a ground stake, or Merriweather and Bethel Woods that restrict or ban outside chairs, are regulating what gets pushed into the turf or hauled in with legs — not something that sits loose on top of a blanket or bare grass. Worth a glance at your specific venue's list either way, but it isn't built like the things those rules target.