Had the wizard wheeze of buying a bar of their shampoo (solid, not liquid so much easier through security on a handbagge only trip- and it works really well) and found it so useful I went to buy some more. Mentioned to the girl on the till that you could eliminate most of the airport security hassles by just using Lush products and she promptly gave me several little bags of testers (the shampoo tester lasted me 5 hair washes - also massage bar, shower soap etc)..........................

May be worth a try?