f2o Waterdrop 5-pack

When you find any water source in the wilderness (non-saline), you simply toss one or more of these bags in, leave them for a maximum of 7-10 hours, and once the forward osmosis has completely filled the bag, what you have is not just a product to quench your thirst but a solution similar to a sports drink, that will help replenish much needed calories, electrolytes, and other nutrients.