Sometimes you need a spare set of underpants, just in case. You don’t want to find yourself with a dirty pair of shorts on, should you think you might need to show them anytime soon. With this little tin can you could have Instant Underpants. They are extremely compact, but to loosen them up you’ll just have to soak them in a little bit of water. You can pick up the Archie McPhee Underpants for $3.50.