I decided to open an MRE, Surepak-12 brand. I opened the Cheese Tortellini, ate it cold. Not bad taste, the dogs ere not happy that I was not sharing some new food with them. I usually save the heaters for the specific ones for heating! What drove them mad, when the Peanut Butter cookie package was opened! I keep the MRE's in the cold dark closet for shelf life.