Honestly, we're not sure how anyone could come up with the idea of a piranha plant keepsake box. A keepsake box, ideally, is designed to keep your precious items in a safe place so you'll always know where they are. Piranha plants, on the other hand, are about as far away from safe as you can get. They're man-eating plants, some varieties of which can breathe fire. Still, despite all that, this keepsake box -- designed by Etsy user lostmitten -- still manages to be kind of cute. As of this writing, there is a single one available for purchase at $60.
We suppose you could pick it up and store your old high school love notes in there. Just watch your fingers when you open it up.