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Freeze as much of the contents as practical eg bottled soft drinks, spare water. You can freeze water in a bladder such as Platypus or Camelbak (with lids rather than hoses ideally) - don't fill c...
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Freeze as much of the contents as practical eg bottled soft drinks, spare water. You can freeze water in a bladder such as Platypus or Camelbak (with lids rather than hoses ideally) - don't fill c...