Always be sure to have a clean water supply wherever you are. Aqua Tabs provide an effective solution for purifying water while hiking the backcountry or for emergency preparedness. 1 small pack contains 50 tablets that will purify 50 litres of untreated water. Simply add one tab to one litre of water and wait 30 minutes to drink. Odourless, colourless, and with no bad taste, each tablet is individually sealed and weighs next to nothing - ideal for purification on the go.