Per your last post, griffin, I'm thinking that anyone who spends any time in the water--a backyard pool, beach or lake vacation, water park or hotel jacuzzi needs a swim capsule!
Suit for activity - one piece, tankini, or athletic style bikini that stays put
Suit for lounging - one piece or bikini
Sun protection - rash guard, hooded light weight jacket, mesh dress
In transit - shorts, dress, parero
Accessories-flip flops, sandals, or water shoes, hat, sunnies, beach bag, towel
Although it might not get the most wear, there would be no last minute panic like when trying to find a suit in February for a mid winter break, or no excuse not to accept a last minute invite to a friend's lakeside cottage! No more embarrassed slink down the hotel hallway and elevator with a towel as wrap, and sport sneaks. Nothing so precious that it couldn't be wash and hang to dry or would get stained by chlorine or saltwater.