—A base wider than the gap

Your picnic table is rough-sawn on purpose.

Name: The Campsite Cup Holder
Brand: Steadi Labs

The Forest Service’s own site design guide tells designers to “specify larger, rough-sawn lumber rather than smooth-milled lumber”. The tops are nominal 2×10 southern yellow pine. And the table maker sells a $21 kit whose entire purpose is stopping those planks warping out of alignment.

So the wobble is not your table being old. It is the table working as specified. This is a 5.2-inch base that spans the gap and sits across the grain.

4.9 average · 121 reviews

See the packs

from $14.95 · free shipping on every order

Ships from Orange, California. 90 days to change your mind, used is fine.

A bottle standing in a black Steadi on a weathered wooden picnic table with food and trees behind. — On the planks, at a table like yours. Twelve colours in all.

—The site is specified, right down to the gravel

Everything at your site is built to a published standard.

These are the manufacturers’ and the agencies’ own documents, read on 3 September 2026. Once you have read them the wobble stops being a mystery.

The top

2×10

nominal, #1 SYP

“TOP/SEAT MATERIALS: 2″ x 10″ (nom.) untreated or pressure treated #1 southern yellow pine.” Separate planks, with gaps between them.

The heights

30″ / 18″

table and seat

Nominal 30 inches to the table top, 18 to the seat. The Forest Service anticipates tops of “heavy timbers” that “may be quite thick”.

The ground

1.5%

sloped, to drain

Compacted crusher fines, “sloped 1.5 percent to drain”. One NPS construction spec calls for decomposed granite six inches thick. Nothing at a campsite is level by accident, and nothing is level.

So: across the planks

$14.95

nothing

A 5.2-inch moulded base. It is wider than the gap between two planks, it does not care which way the grain runs, and it lifts off.

Sources: pilotrock.com (R.J. Thomas Mfg. Co., UT Series picnic table specification and Model TAK-21G alignment kit) · USDA Forest Service, Sustainable Recreation Site Design Guide and Accessibility Guidebook for Outdoor Recreation and Trails · National Park Service Campground Design Guidelines (2021) and a Yosemite campground accessibility construction specification. Fetched 3 September 2026 and quoted as published.

—The tell is that somebody sells a kit for it

The maker of your table also sells the fix for your table.

A $21 kit exists purely to keep the planks in line
Pilot Rock’s Model TAK-21G: “Each Table Alignment Kit includes (2) formed 28-inch long pregalvanized steel channels and wood screws (installed from bottom up).” You screw steel underneath the table to stop the top warping apart.
Eight feet minimum, by design
The National Park Service: “Ensure picnic tables are a minimum length of eight feet.” That is a lot of plank, and every foot of it is free to move independently of the next one.
The site is zoned before it is built
NPS allots “12′ x 14′ table and bench space” and a separate fire ring area. The table is where everything happens, which is why everything ends up on it.
And the ground under the fire ring is aggregate, never concrete
Forest Service guidance: “Install compacted aggregate (never concrete) for the ground surface under the fire ring.” There is no flat hard surface anywhere at a designed campsite, and that is deliberate.

pilotrock.com · nps.gov · fs.usda.gov. Fetched 3 September 2026, quoted as published. Steadi Labs is not affiliated with any of them.

A hand sliding an aluminium can down into the fins of a Steadi. — The whole installation. No clamp, no screws, no steel channel.

—Does it actually work

It wobbles. Then it settles.

Somebody leans on the far end of an eight-foot table and the whole top moves. The base is 5.2 inches across, so it spans the gap between planks rather than balancing on one edge, and the drink comes back level.

Filmed on a couch cushion — softer and less predictable than a plank, which is the point of showing it there.

A full can standing in a white Steadi on a cushion. — Real footage, one take, no cuts.

—How it holds

Width, and nothing else.

The base

5.2 inches across and fixed. On a plank table that width does two jobs: it moves the tipping edge further out, and it bridges the gap between two boards instead of standing in it.

The fins

Six of them, holding the bottom inch. Cans and bottles slide on from the top; tumblers and glasses drop in. Drink and base then rock as one piece.

The grain

Rough-sawn timber is a good surface for grippy TPU and a poor one for a narrow cup base. This puts the wide grippy thing between the two.

A macro photograph of the flared base of a terracotta Steadi, showing the moulded STEADI mark. — The flare, close. That width is the entire mechanism.

See the packs — from $14.95

—The object

One piece of rubber. Nothing to clamp.

No clamp jaw with a thickness limit, no pole to swivel onto, no proprietary table to buy first. It goes on the planks, and at the end of the weekend it goes in the tote wet.

Base5.2″ — fixed
Height2.8″
Opening at rest1.64″
Weightabout 3.6 oz
Fins6, from 0.92″ up, flexing to 3.15″
MaterialShore 85A TPU
Table thickness limitNone — it does not clamp
RainFine. It is rubber.
CleaningRinse, wipe, or dishwasher

Several sizes of can standing in Steadis side by side, from a slim can to a tallboy. — Slim can to tallboy. Bases between two and three inches all seat.

—What seats and what does not

Bases between two and three inches. Measure the bottom, not the rim.

A standard 12 oz can is 2.6 inches across the bottom. A Stanley Quencher 40 oz is 3.1 and seats snug. A mug with a handle does not seat at all — the handle lands exactly where the fins grip, and that is a straight no. An enamel camp mug with a handle is the same answer, which on this door is worth saying out loud.

Search by container

Every width below comes from a published specification, not from us. Where a spec is uncertain, the answer says so.

Container

Or the width across the bottom

Width in inches

A width across the bottom of the cup, in inches.

Without a tape measure

A standard sticky note is three inches square. A cup standing on one with its base inside the paper will seat.

Anything that overhangs, or anything borderline — hello@steadilabs.com reaches a person, and the answer will be honest either way, including a no.

—Where they end up

The table, the bench, the cooler lid, the tailgate.

The picnic table first, because that is where the site puts everything. Then the bench itself at 18 inches, the cooler lid, the tailgate, and your own folding table if you brought one. Not the ground — the ground is crusher fines sloped a percent and a half to drain, and nothing stands up on that.

Twelve colours, and the picker assigns one per unit, which around a table of eight is how anybody finds their own again after dark.

—What the aisle costs

Everything else clamps, screws, or needs a table you do not own.

Prices were looked up on 3 September 2026, not estimated. Every figure is the seller’s own.

The product	Price	What it asks of the site
Coghlan’s deluxe tablecloth clamps, 4-pack	$4.99	A table “up to 2 inches thick”. And it holds a tablecloth, not a drink — it is in this table because it is what most people actually bring.
Pilot Rock table alignment kit (TAK-21G)	$21.00	Two 28-inch steel channels and wood screws, fitted from underneath. It fixes the table rather than the drink, and it is the manufacturer’s own admission that the top moves.
VIVO clamp-on cup holder	$19.99	An edge to clamp: “Maximum Desktop Thickness: 2.25″”. A heavy-timber park table top may be thicker than that.
23ZERO universal camp tray and cup holder	$25.00	A round pole to swivel-mount onto. A picnic table has plank edges, not poles.
Core FlexRail cup holders and hooks	$24.99	Core’s own FlexRail camp table, which is $149.99 on offer and $169.99 regular. It will not attach to a park table.
The Campsite Cup Holder	$14.95 · four for $39.95, $9.99 each	A plank. Any plank, any thickness, any grain.

If your table has a clampable edge under 2.25 inches, the VIVO is a real answer at $19.99 and it will not slide anywhere. The catch is that you are clamping to a public table you do not own, on a plank that the manufacturer already sells steel to keep in line.

And if you bring your own camp table with a rail system, buy that system’s own holders. They will fit better than anything generic, this included.

—Get one

How many, and what colour goes where.

An eight-foot table seats six to eight. Four is what most groups order, and the colours are how people find their own after dark. Free shipping on all of them.

Checkout is handled by Steadi Labs — the company that makes The Campsite Cup Holder. Secure checkout at steadilabs.com. Free shipping on every order, and 90 days to change your mind, used is fine.

—From people who bought one

One of these is from a picnic at a state park.

Verbatim, unedited, not filtered by rating. None is from a reserved campground site and we are not going to imply otherwise — they are here because they describe outdoor tables and benches that are not level.

A black Steadi on a grandstand bench holding a canned drink in a glitter koozie, a spectator's leg beside it, at an outdoor race — Photograph sent in by Holly J with this review.

★★★★★

Our seats are metal benches with a slight slope towards the back, making it impossible to set down any type of drink. They worked perfect, holding our drinks on the bench & on our cooler.

Holly J · June 2026Photo from the buyerPhoto from the buyerPhoto from the buyerPhoto from the buyerPhoto from the buyerPhoto from the buyerPhoto from the buyer

★★★★★

Most of our time is spent outside, at the house and nearby parks. The Steadi has been popular for sitting out under a pop up canopy on lawn chairs and at a picnic at a nearby state park. We brought the four we ordered and have already placed an order for more since family members have claimed the first ones!

Haila Buskirk · May 2026

★★★★★

They also stay steady on the little wobbly patio table outside.

Susan Ilkenhans · May 2026

★★★★★

Every Friday is game night on the floor at our house and almost every Friday something spills. Not anymore. Thank you Steadi!

Felisha Gomez · May 2026

18 more, photographed by the people who bought them

Sent in with their reviews. Tap any one to read it. Different rooms, different drinks, different colours — none of them staged by us.

A slice of one product-wide corpus — reviews of the Steadi, not of this page. The full corpus is published live.

—The limits, in one place

What it does not do.

It does not work on the ground.
A campsite surface is compacted crusher fines or decomposed granite, sloped about one and a half percent to drain, by specification. A flat foot on loose aggregate on a slope leans, and this is a flat foot.
Wind is not something it resists.
An empty can goes over in enough wind whatever it is standing in. This widens the base; it does not add weight, and 3.6 ounces is not much in an exposed site.
It is not spill-proof — nothing is.
It resists tipping by widening the footprint. Somebody standing up hard from an eight-foot bench still moves the whole table.
A handled camp mug does not seat.
The handle lands exactly where the fins grip. Enamel mugs, tin mugs, two-handled mugs — all the same no. At a campsite that is a real limitation and it is not buried in the FAQ.
It does not attach to the table.
No clamp and no screws, which is deliberate on a table you do not own — but it also means it is a loose object at a site, and loose objects walk off.

—If it turns out to be the wrong thing

Ninety days. Used is fine. Nothing goes back in a box.

Ninety days is most of a camping season. If the answer is no, hello@steadilabs.com reaches a person and the money comes back — no form, no restocking fee, no questions about condition, and nothing to pack up or post. Woodsmoke, sap and dirt included.

You order. Free shipping, every order, always.
It leaves Orange, California within one business day.
USPS, 2–5 days, tracked.

—Who makes it

Steadi Labs. One person, in Orange, California.

The steel injection mould open in the machine, the cavity that forms the base visible. — The mould, in the machine.

Scott Rodriguez at a workbench, holding a terracotta Steadi and looking at it, with shipping boxes behind him. — Scott, who makes them.

Scott Rodriguez made the first one after a full drink went over on a soft cushion with three kids under three in the house. It was built for spills, not for campsites.

Nobody camping asked for this page. It exists because a wide base does the same thing on a warped plank as it does on a cushion, and because the people who build picnic tables have written down exactly why the plank moves.

We make one thing and we make all of it here — the moulds, the material, the colour runs, everything within about three and a half miles of the shop.

Steadi Labs — veteran founded and veteran owned
Designed, injection moulded, picked, packed and shipped in Orange, California
Patent pending
100% BPA free
5.2 inches across the foot, about 3.6 ounces

— Scott, Steadi Labs

—Questions

Straight answers.

Will it sit across the gap between planks?

Yes — that is most of the point. The base is 5.2 inches across and park table tops are nominal 2×10 boards, so it spans a joint rather than standing in one.

Does it work on the ground?

No. Campsite surfaces are compacted crusher fines or decomposed granite, sloped to drain by specification. A flat foot on loose aggregate on a slope leans over.

What about my enamel camp mug?

Straight no. The handle lands exactly where the fins grip. That is true of every handled mug and it is the most common disappointment on this page.

Will it hold a 40 oz Stanley?

Yes. The Quencher H2.0 40 oz is about 3.1 inches at the base, inside the range the fins flex to. Snug rather than drop-in — it seats with a push.

Does rain hurt it?

No. It is Shore 85A TPU with no metal and no moving parts. Leave it out, pack it wet, run it through the dishwasher when you get home.

Will it stain from the table?

It does not mark the table and lifts clean. Pressure-treated and weathered timber can mark most things it touches; this is rubber, so wipe it and it is fine.

How much room does it take in the tote?

2.8 inches tall, about 3.6 ounces, and they nest. Four take less room than a pair of boots.

Why does this site only sell one thing?

Because it is one thing. It is a Steadi, made by Steadi Labs in Orange, California, and checkout finishes at steadilabs.com where the company lives.

—Still deciding

$14.95 for a piece of rubber.

It is. The clamp is $19.99 and needs an edge under 2.25 inches; the rail system is $24.99 plus a $149.99 table. Ninety days covers being wrong about this one, used and filthy.

I’ll just bring a tablecloth.

Most people do — the clamps are $4.99 and they are the right call for the plank gaps and the splinters. A cloth over a warped top is still a warped top under the cup, which is the bit this is for.

Is it another thing to lose?

It is a loose object at a campsite and we say so in the limits. Twelve colours help, one per person, and the four-pack exists because people do leave one on a table.

Will it survive the tote all winter?

No hinge, no spring, no metal to corrode. Long-term UV exposure is not something we have tested, so we do not make a claim about it.

Your picnic table is rough-sawn on purpose.

Everything at your site is built to a published standard.

The top

The heights

The ground

So: across the planks

The maker of your table also sells the fix for your table.

It wobbles. Then it settles.

Width, and nothing else.

One piece of rubber. Nothing to clamp.

Bases between two and three inches. Measure the bottom, not the rim.

Search by container

Or the width across the bottom

Without a tape measure

The table, the bench, the cooler lid, the tailgate.

Everything else clamps, screws, or needs a table you do not own.

How many, and what colour goes where.

One of these is from a picnic at a state park.

18 more, photographed by the people who bought them

What it does not do.

Ninety days. Used is fine. Nothing goes back in a box.

Steadi Labs. One person, in Orange, California.

Straight answers.

$14.95 for a piece of rubber.

I’ll just bring a tablecloth.

Is it another thing to lose?

Will it survive the tote all winter?

The table was never flat. Now it does not have to be.