Authentic USGI Flameless Ration Heaters – same as included with MREs and similar rations. FRHs are a hassle-free way to heat up your meals, whether you're camping, hiking, or preparing for emergencies. These heaters work without fire or electricity, so you can discreetly enjoy hot food wherever you are. Simply add a bit of water to the heater, and it sets off a special reaction that warms up your meal pouch in just a few minutes. These are very easy to use and don't need any extra fuel or batteries. Plus, they're safe and eco-friendly, leaving behind no mess or harmful fumes. Flameless Ration Heaters are tough enough to handle outdoor adventures and compact enough to carry in your backpack. Say goodbye to cold meals and hello to hot, delicious food wherever you go! Please note, these are for ADULT USE ONLY! Contents can get very hot and cause serious burns. Follow directions exactly as explained on the FRH Envelope and discard in regular trash only after the FRH has cooled to room temperature.