Airline carry on: 89ml (3fl.oz) travel bottle is approved TSA standard, so you can carry it in the airplane.
Hook design with strong suction cup: Whether hang or adsorb on the wall, it is very convenience for using, and easer for you to catch shampoo and conditioner in the shower.
Leakproof: The lid of the bottle has 3 layers, what's more the valve of cap has a silicone layer.
Content identification: Switchable label, each travel bottle has pre-printed labels (Shamp./ Soap/ Lotion/ Cond./ Sun/ Empty) to identify liquid in the bottle. Different colors also can help you identify the bottle.