1. I definitely think it's just a cheap way to package things. No airline requirement that I know of!! 2. The dollarama or dollartree has the clear packages for really cheap. Nothing says you couldn't make nicer non transparent ones 3. I'm definitely doing the hangover kit..just add water I'll put advil and probably gravol or pepto/tums. I'm also putting aloe, lipbalm with SPF, bandaids, safety pins, etc in the just in case bag.