A case of canned food doesn’t do you much good if the can opener is back in the kitchen.

The P-38 is the compact folding can opener designed for U.S. military field rations. At approximately 1½ inches long, it folds flat and has a small hole for a key ring or dog tag chain. Keep one with your emergency food, clip one to your keys, or stash one in your cook kit.

To use it, unfold the cutter, hook the notch onto the can rim, and rock the blade through the lid. Work your way around the rim until the lid comes free.

• Stamped U.S. Shelby Co.

• Approximately 1½ inches long

• Folding steel cutter

• Attachment hole for a key ring or ball chain

Includes one P-38 can opener. Dog tags and chain shown for demonstration.