Metal water bottles are great, as they shouldn't melt when you heat them to melt ice.
Aside from their normal use, MRE's when frozen make great blunt force weapons for close range (Ha Ha).
Remember if any of the inner packages are swollen (tight like a balloon), DO NOT EAT. It is swollen because something is giving off a gas. Just like decomposition in a corpse.
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I do the things that I must, and really regret, are unfortunately necessary.
RIP OBG