Maybe it's part of the eco-bag trend, but toting around a mini-suitcase guarantees that you'll always pretty much be up for whatever, whether it's a trip to Whole Foods or a slumber party.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.