Used for warming MRE pouches to help in preparing a warm meal on-the-go. There are 12 to a pack. Simply insert MRE pouch (not included) into the heater, add water to the fill line, lean against a solid surface that will not be affected by steam or heat, wait for steam to stop, remove the MRE pouch, open the pouch, stir food & enjoy! CAUTION!! Food may be too hot to consume initially. Wait 1 full minute before consuming.