A travel-size bottle of Bumble and Bumble’s Prêt-à-Powder dry shampoo , because when you’re on the road, a full wash isn’t always in the cards — but that doesn’t mean you have to feel greasy all day if you don’t want to! This stuff will banish any oil from your locks and add some volume while it’s at it – and even better, it won’t eat up any space in your liquids bag, thanks to the fact that it’s, y’know, a powder.