ThinkGeek:

A Candwich Canned Sandwich is one tasty DIY treat, just waiting for you to crack it open. When you pop the top of your Candwich Canned Sandwich, you’ll hear an audible hiss of magic, and out will spill the contents to make one yummy sandwich. And best of all, each Candwich Canned Sandwich has a 1 year shelf life…

I almost threw up just reading about this.