Each of the four bottles holds 30 ml (about 1 oz). Every bottle has measurement markings in 5 ml steps, so you can easily see how much product is left.

At 30 ml each, they fall under the common 100 ml / 3.4 oz carry-on limit for liquids. Rules vary by airline and country, so check your carrier’s current requirements before you fly.

They’re made for toiletries like shampoo, conditioner, body wash, lotion, toner and serum. The included label stickers help you mark what’s in each one. For thicker products, the spray pump works best with thinner liquids.

Unscrew the pump top to refill. To clean, rinse with warm water and pump a little through the nozzle to clear the tube. Let them air-dry fully before refilling to avoid residue buildup.

The spray-pump tops are designed to seal when closed, but no travel bottle is fully leak-proof under pressure changes. To be safe, don’t overfill (leave a little air at the top), make sure each pump is screwed on tight, and keep the set in its case or a sealed pouch inside your bag.