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As others have pointed out, you cannot do so with a portable cooler. It is, however, possible to keep ice for months, passively. You will need to dig an ice house, which should be the size of a t...
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As others have pointed out, you cannot do so with a portable cooler. It is, however, possible to keep ice for months, passively. You will need to dig an ice house, which should be the size of a t...