Rock or Something

thingiverse

If you've ever eaten an MRE, you know that the flameless ration heater is meant to be used with a "rock or something." Maybe you used a rock; maybe you used an or something. Now, you can heat your MRE as God and the Pentagon intended: with an authentic Rock Or Something! Disclaimer: maybe don't actually use this for heating an MRE, I don't know what temperature the heater gets to, I'm not responsible for melted plastic.