Can I take slime on a plane?

Can I take slime on a plane? Yes — but it counts as a liquid

Slime is treated as a liquid at airport security — capped at 100ml in the cabin. Play-Doh and kinetic sand are usually allowed as solids. Putty depends on consistency.

Last updated May 27, 2026 · Reviewed against current airport security guidance

Short answer

Slime is treated as a liquid at airport security — capped at 100ml in the cabin. Play-Doh and kinetic sand are usually allowed as solids. Putty depends on consistency.

General guidance

Rule basis: General airport security guidance — rules can vary between airports and change over time. Confirm with your departure airport before you fly.

What to do: Pack to 100ml per container in a single 1-litre clear bag unless you've confirmed a larger allowance at both your departure airports.

Liquid Limits is a travel planning tool, not an official aviation source. Always confirm with the airport before you travel.

At a glance

Security · Airline · Border

Security

Will this pass the checkpoint?

Check rules

Rules vary by airport — some still enforce 100ml, others now allow 2L containers in CT scanners.

Source: Airport operator pages

Airline

Can this travel in cabin or checked baggage?

Cabin OK

Most airlines defer to airport security on liquids in the cabin.

Border

Can you bring this into the destination country?

Usually OK

Liquids themselves are rarely a customs issue — but contents (alcohol, dairy, CBD) might be.

Three separate rule systems · Any one can stop your item

Quick answer

Slime: 100ml container in cabin, any size in checked. Play-Doh and kinetic sand: usually fine as solids.

Officers have discretion. A jumbo tub of slime — even sealed — will be refused at most checkpoints.

Cabin vs checked

Type	Cabin	Checked
Slime (any brand)	≤100ml	Yes
Play-Doh (per stick)	Usually yes	Yes
Kinetic sand	Usually yes	Yes
Silly Putty / Thinking Putty	Officer discretion	Yes

Why slime is a liquid

It's pourable and conforms to its container — the two main tests security applies. Even 'fluffy' or 'cloud' slime fails both.

Packing tips

Buy a small 50–80ml pot specifically for the flight
Pack jumbo slime tubs in checked luggage, double-bagged
Bring tablets/games as a backup — slime will lose pressure and ooze at altitude

FAQs

Can my kid bring slime on the plane?

Yes — in a container ≤100ml inside your 1L bag. Bigger pots go in checked luggage.

Is Play-Doh a liquid?

No, it's classified as a solid and allowed in normal quantities.

Will slime explode at altitude?

Sealed tubs can leak as pressure changes. Double-bag them.

Check your trip