These Hydrachem UK water purification tablets provide reliable water treatment for outdoor activities and emergency situations. Each tablet treats 1 litre of water, effectively neutralising bacteria, spores, viruses and waterborne diseases. With a 5-year shelf life and compact size, they're perfect for camping, hiking, travel and survival kits. The British Army NATO issue certification ensures trusted performance. Simply add the tablet to clear water, wait 30 minutes, and enjoy safe drinking water wherever you are.