If you want to be prepared for whatever life throws at you, you should take a look at Milwaukee's 6-in-1 Fastback folding utility knife. It may come in handy.

Some Fastback models like the 1502 and the 6 in 1 (1505) have room to store spare blades. While the storage is easy to spot on the 1502, the blade storage might go unnoticed on the 1505.