Okay, but what about people with shit immune systems? Hi. Me.
Some are for long trips, some are for shorter ones, others are strictly snack-related, two are first-aid (mild to severe), once my friend Ben needed a place to put all his notes so I got that for him, and my other friend Richie is a gigantic spaz so there's a fanny pack for the shit he used to pick up and hand to me, which is now the Bev fanny pack because she does the same thing. Organized chaos. It's a skill.