CardSharp - Superlight and Supersharp utility knife that's the same size as a credit card
Being from the south I think it's always a good idea to have a knife on you. You never know when it could come in handy and it's nice to have one when an opportunity presents itself. There are several ways to go about caring a knife. You could simply carry one around, put one on a keychain, or like this knife keep it in your wallet.
This knife can go from your wallet to work with three simple folds. It features a stainless steel surgical blade that offers a rust free knife as well as super sharpness. The little device isn't on the market just yet, but will come available until the first quarter of 2011, so sometime in January I assume. The knife will be sold for around $23, which isn't bad for such a unique and handy knife.
Check out how this this thing folds out. CardSharp