It looks like Polar Pure might be shutting down due to the owner being unwilling to cooperate with and bear the expense of federal drug enforcement policies. Polar Pure is a water disinfectant that uses iodine crystals in a small glass bottle. A big benefit of it is a long shelf life, even after opening.

A tiny blip on the general public's radar, but a good-sized loss for backpackers and "preppers" everywhere.

Federal agents say 88-year-old Saratoga man's invention is being used by meth labs