A flexible base that holds your can, cup, or 40 oz tumbler steady on the dropped gate, the bed floor, or the air mattress between the wheel wells — wherever the bed turns into a bench, a table, or a campsite for the night. Nothing clamps to the rail, mounts to the bed, or bolts to the truck; it sits on top and rides home in the glovebox.
One flexible base. Empty, then a can, a cup, and a 40 oz tumbler — same base, whether it's riding the gate or the wheel well.
The situation
Six cup holders up front. Zero back where everyone's actually sitting.
Trucks ship with cup holders by the half dozen in the cab — and none in the bed, which is exactly where people sit once the gate drops. Wherever a drink lands back there, it's borrowing a spot that was built for something else.
The dropped gate, the second you sit on it.
An open gate sits right around bar-stool height — 37.4 inches on an F-150 — which is exactly why it becomes the bench. But it's stamped steel with ribs for stiffness, not flatness, spring-hinged so it dips each time someone climbs up, and a can standing in a channel goes over the moment the gate bounces.
The bed rail cap, the one continuous ledge.
It runs the whole length of the bed and looks made for something — except it's roughly 1.5 to 2 inches wide, narrower than almost any drink's base, so whatever's set there is already overhanging before the first knock from inside the bed or the first hip brushing by outside.
The wheel well hump, the built-in stool.
It's the one thing back here shaped like a seat, which is exactly why people try using it as a shelf too — but the top is crowned, not flat, so a flat-bottomed cup touches down on a sliver of its base and slides for the floor the moment the truck rocks.
The bed floor, liner or bare steel.
A drop-in liner is slick on purpose so cargo slides in easy; a spray-in coating adds grip but the corrugated ribs underneath stay put. Either way, a drink set down back there travels with everything else — owners describe gear sliding cab-to-gate and banging the bulkhead on a rough road, and a sweating can only helps it along.
The air mattress, once the bed becomes camp.
Fitted between the wheel wells for a drive-in or a night under the stars, it re-shapes with every roll-over. There's no flat spot anywhere on it, so a cup set near the edge sinks its own little valley and leans into the dark.
None of it ruins the day. It's just where a drink ends up when the bed is doing five jobs at once — bench, shelf, table, mattress — and none of them were built to hold one.
You know the moment
Drop the gate. One of these is coming.
Game day, three hours before kickoff
The gate's been down since nine, the spread laid out across it. Someone hops up to sit and the spring-hinged gate dips — the can that was standing between two ribs goes over into the chips.
Drive-in, second act
The drink's been balanced on the air mattress edge since the trailers. Someone rolls over for a blanket, the mattress re-shapes, and the cup vanishes into the bedding in the dark — found later by feel, half empty.
Job-site lunch, noon
Coffee set on the ribbed steel next to the sandwich. A coworker tosses a tool bag into the bed, the jolt walks the cup right off the channel it was straddling.
Washboard road into camp, golden hour
Everything that started out near the gate arrives piled against the cab wall — the water bottle included, cap-first in the corner under the duffel, exactly like the slick-liner complaints always describe.
Load-out at the ramp, dusk
The bottle's parked on the drop-in liner while both hands heave the cooler over the gate. One shove of the cooler sends it skating across the slick plastic to the far wall.
What you get
Three reasons it stays out.
01
Bridges the ribs, the rail, the crown — whatever's under it
The wide flexible base rides across the tailgate's ridges, the rail cap's narrow lip, and the wheel well's curve instead of teetering on the one high point each of them offers. Someone sits down, a tool bag lands, the truck hits washboard — the drink settles back level.
02
Holds what actually rides back here
The can in a koozie, the party cup, the lidded bottle, the 40 oz tumbler that never fit the factory console holder to begin with. Cans and bottles slide on; cups and tumblers drop in through the fins and get gripped by the bottom inch.
03
Nothing clamps, mounts, or bolts on
One piece of matte flexible material — no rail clamp sized for somebody else's truck, no magnet hunting for steel that an aluminum body doesn't have. It sits on top of whatever's flat back there and rides home loose in the glovebox, not bolted to anything.
The fit test
Three inches decides it, before you climb up.
your cup's base lands in here
A square sticky note: 3 inches, exactly.
01
Grab a sticky note.
The standard square measures exactly 3 inches on a side — a fact about sticky notes, and it happens to land right at the ceiling of what the base can hold.
02
Stand your cup on it.
Set the 40 oz Stanley down flat on the note and look at the base, not the rim — the tumbler that never fit the factory console holder is exactly the one this test is for.
03
Read the note.
Base lands inside the square: it fits. Hangs over the edge: too wide. Lost in the middle, under about 2 inches: too narrow to grip.
The sticky note lives in the glovebox for exactly this — set today's cup on it before the gate ever drops.
Will it fit my cup
Measure the bottom, not the top.
The rule's the same back here as anywhere else: a container base about 2 to 3 inches across settles in. Every verdict below follows from it — including the 40-ouncer that never fit the cab.
Stanley Quencher 40 oz fits
Yeti Rambler 20-30 oz fits
12 oz can in a foam koozie fits
16 oz tallboy fits
Red party cup (Solo-style, 18 oz) fits
12 oz glass longneck fits
Travel mug, no handle fits
28 oz sports-drink squeeze bottle fits
Slim seltzer can fits
Coffee mug, handled handle in the way
1-gallon water jug too wide
There's a floor as well as a ceiling — under about 2 inches the base sits too loose to grip. The handled mug is the honest exception: the base fits, but the handle lands exactly where a fin needs to close around it.
How it works
Three parts, no moving parts.
The base spreads out.
Ribs, rail caps, and a crowned wheel well never give a container a full, flat footprint — narrow bases teeter on whatever high point they land on. The wide flexible base bridges the gap instead of balancing across it.
The fins grip.
Flexible fins hold the drink from the sides by its bottom inch, so a bouncing gate or a dropped tool bag can't rattle it loose.
It settles.
Someone climbs up on the gate, the truck hits a washboard stretch, the air mattress re-shapes underneath — the base flexes with the surface and brings the drink back level.
Nothing mounts to the bed. No rail clamp sized to one specific bed, no magnet hunting for steel an aluminum-bodied truck doesn't have, no bracket that stays behind when the truck gets sold. It sits on top of whatever's flat — gate, floor, rail, wheel well, mattress — and picks up in a second when the tailgate comes back up.
Gate to wheel well
Six surfaces back here, and each one beats a drink a different way.
The reason a drink doesn't survive back here isn't clumsiness — every surface in the bed was engineered for cargo and vibration, not for holding a cup steady while people sit, eat, or sleep around it.
The dropped tailgate
Stamped steel ribs and channels — or a plastic cap with its own ridges — add stiffness, not flatness, and the spring hinge means it dips and bounces under any weight. A can bridging two ribs never sits flat; tailgating-gear reviewers name the uneven ridges as a direct cause of spills.
The drop-in bed liner
Slick HDPE plastic, deliberately low-friction so cargo slides in without a fight — the same slickness lets a bottle skate. Owners report gear sliding cab-to-gate and slamming the bulkhead on rough roads, and a sweating can only makes the plastic slicker.
Spray-in coating over corrugated steel
Textured coatings add grip, but the floor underneath keeps its ribbed profile — raised channels every few inches from bulkhead to gate. A flat container base still bridges the ribs or tips into a channel, and on washboard roads the whole floor turns into a vibration table.
The air mattress
The standard drive-in setup, fitted between the wheel wells and layered with blankets. Soft and inflated, it re-shapes with every shift of weight — there's no flat anywhere, and a set-down cup sinks its own low spot and leans before anyone notices.
The bed rail cap
A lip roughly 1.5 to 2 inches wide running the length of the bed, broken up by stake-pocket cutouts. Narrower than almost any container base, so a drink parked there is half overhanging by definition.
The wheel well hump
The bed's one natural seat — crowned and curved on top, not flat. A flat-bottomed cup touches at a sliver of its base and slides toward the floor the moment the truck rocks or the surface gets wet.
Versus what you do now
Compared to what people already try to bolt on back here.
Magnetic cup holders
They need bare ferrous steel to grip, and the 2015-and-newer F-150 — America's best-selling truck — has an aluminum-alloy body and bed, so magnets don't hold, and they don't hold on a plastic tailgate cap or a lined bed either. The listings admit as much: makers advertise rubber coatings to stop scratched paint and 'anti-fall' designs, which telegraphs the two complaints that keep coming back — scratched finishes and holders that let go.
Clamp-on and bed-rail-mounted holders
Install guides warn the clamp has to close over the rail's thickness with the bedliner lip already in place, and that liners and rail caps get in the way of a good bite. Mounted ones snag cargo during hauling, fight with tonneau covers, and forum owners call the permanently visible ones bulky and gaudy — the category's thin enough that people end up building their own with brackets and t-nuts.
Genuinely popular on truck forums, which proves the need is real. But each one is built for one specific truck, occupies the tailgate latch or bolts straight into the gate, and stays behind the day the truck gets sold or a friend borrows a different one.
Tailgate bar and table units
They level the bartop, not each person's drink — the cup still sits on ribbed steel or the wheel hump the moment it leaves the station. The wooden ones ding up in normal use (one ships with its own touch-up marker), and it's one more bulky thing to haul and stow.
Before you buy
Questions people actually ask.
Does it really hold on a ribbed tailgate?
Yes — hard, uneven steel is well inside its range. The wide flexible base bridges the gate's ribs instead of teetering across them, and the fins grip the cup by its bottom inch, so a bounce from someone sitting down doesn't rattle it loose. Knock it sideways and it settles back level.
What about the bed floor — liner or bare steel?
Both. On a slick drop-in liner the wide base doesn't skate the way a bottle does, and on a corrugated or spray-in floor it bridges the ribs instead of tipping into a channel. Either way it resists tipping through the washboard-road vibration that walks loose gear around.
Does it clamp or mount to the truck?
No. Nothing clamps to the rail, mounts to the bed, or bolts to anything — it sits on top of whatever's flat back there and picks up in a second when the tailgate goes back up.
Will my 40 oz Stanley actually fit? It doesn't fit the console.
Go by the bottom, not the rim. A base about 2 to 3 inches across settles in, and the 40 oz Stanley does. Handled mugs don't — the handle lands right where a fin needs to close.
Does it work on an air mattress at the drive-in?
Yes — soft, shifting surfaces are exactly the kind of movement it's built to ride out. The base flexes with the mattress instead of sinking a hole into it, and settles the drink back level when someone rolls over for a blanket.
Does it care if my truck is aluminum-bodied, has a spray-in liner, or a different bed size?
No. It never needs a magnet, so an aluminum body doesn't matter, and it doesn't depend on rail thickness or liner type either. It sits on top of whatever's flat, on a 5.5-foot bed or an 8-foot one.
The whole bed shakes on a washboard road. Does it hold through that?
That churn is the design brief. The base flexes with the vibration and brings the drink back level instead of letting it walk. It resists tipping, not everything — a direct hard kick still wins — but the ordinary jolt of a rough road is exactly the job.
How do I clean it?
Rinse it, hose it off, or run it through the dishwasher. It's one piece of flexible material with nothing to come apart, and dust, sand, or a soaking doesn't bother it.
Who makes it, and where do I buy one?
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.
Who makes it
Made start to finish in Orange, California.
The maker is Steadi Labs, a small veteran-founded company in Orange, California. It's injection molded — the mold, the material, and the color runs all sit within about three and a half miles of the shop, and every batch is molded there in small runs. The people who make it are the same people who answer hello@steadilabs.com.
Thirty days, wherever you use it.
Use it for a month. If it doesn't do what this page says, email hello@steadilabs.com and it gets made right — no forms, no fight.
Veteran-founded · Patent pending · Made in Orange, California
Give the bed the cup holder the cab already has.
Wherever the gate puts it — the tailgate, the wheel well, the mattress between the wells — it's still standing, still there when you reach for it in the dark.
