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My friends and I are going backpacking and want to keep a single item cold for 2-3 days. Freezing is not a problem - preferably the closest to being frozen as possible. It is medication that may b...
My friends and I are going backpacking and want to keep a single item cold for 2-3 days. Freezing is not a problem - preferably the closest to being frozen as possible. It is medication that may b...