RESULTS This set-it-and-forget-it method can supplement your survival needs, but don’t count on it as your sole supply–unless you have two dozen plastic bags. Our test produced only
a few teaspoons of water in four hours.
DO IT Place a smooth rock in the bottom corner of a plastic bag (the clearer and larger, the better). Pull the bag over a leafy branch. Tie it so air can’t escape. Wait a few hours,
until water collects in the bag’s weighted corner. Untie the bag and pour the water into a container to drink. Works best with succulents and bright green, broad-leafed plants.
TIP Because heat will cause the plant’s pores to close, you’ll get the best results in the morning and evening.