In the category of “things that should have gone in the underwear book,” comes this link, courtesy of Eileen Cook (who must have a deadline to procrastinate about, in order to have found this on the web).
Instant underpants packed into a tin. You carry them in your purse. Then, in case of underwear emergency, you add water. The thing I don’t understand is… if it’s an emergency, who’s going to have time to wave the reconstituted panties in the wind until they dry?
Alas, it’s too late for inclusion in 50 Underwear Questions. My readers will just have to survive without emergency back-up.