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I would add a gallon ziplock bag along with a reusable/fold-able grocery sack. If you end up needing to use this bottle for water storage, you will not have anything to keep the other items included in the bottle in . If you end up needing the bottle and find a clean water source you could fill up the zip lock bag and carry it in the reusable/fold-able grocery sack along with the other items that would be displaced from the bottle.
EL Wire Cowboy Boots