Wherever life takes you, never be without clean drinking water when you have Potable Aqua Chlorine Dioxide Water Purification Tablets. These tablets are effective against viruses, bacteria and cysts such as Giardia lamblia and Cryptosporidium, and the water purification tablets for drinking leave no aftertaste. Add these water purifying tablets to one quart (one liter) of contaminated water, and allow four hours of treatment time for suitable drinking water in emergency situations. The combination of active ingredients in these portable water treatment tablets react to create chlorine dioxide, a powerful disinfectant that meets EPA microbilogical purifier standards to make questionable water safe to drink. These drinking water treatment tablets are individually wrapped for easy storage with your camping accessories. Pop emergency water purification tablets into an opaque bottle for water treatment for drinking water.