Miranda Cosgrove's Must Haves, From Luxury to Drugstore

"I travel so much and my lips get so dry, so I always have some Aquaphor ($15) on hand," Cosgrove tells PS. "Slugging with it isn't really for me — I'm not necessarily putting it all over my face because I don't like how that feels — but I'm re-applying it to my lips all the time."

At $6 a tube (or $18 for a super-sized jar), this do-it-all hydrator deserves a spot in everyone's routine — in-flight or otherwise.