The Best (And Cheapest) Travel Cosmetics Case (from Maskara)

Spoiler: It's a ziplock bag. I like to use these, because: (1) you can see everything that's in each bag without digging through it or dumping it out to find what you want; (2) if something leaks in your suitcase, it's contained, and you can just throw the bag out and use a new one; (3) you can divide everything up into separate bags (shower stuff, makeup, etc.); (4) you can put your carry-on liquids in one and keep them there; (5) they take up very little space; and (6) they're actually reusable for many, many trips unless you are packing something sharp and spiky (are you?) or something spills.