What is the coolest thing you can buy on Amazon for under $20?

[oprahwindfury]

Trying to gather some ideas for this year's gift exchange at work. The limit's $20 so anything at that value's fair game. The company has a fairly laid back atmosphere so gag gifts are open season for me. I'd like to get somebody something they could use on the daily preferably. Maybe like a survival kit or a knife.

[b!z]

Buy some paracord and make bracelets? They're pretty cool and useful too.