Whether youre exploring the outdoors or making emergency preparedness plans, the PUR Clean Drinking Water kit gives you access to clean, fresh water. Kit includes a mixing container, storage container, stirring wand, cotton filter cloth, three PUR Purifier of Water packets and a packet opener. Each PUR packet treats 2.5 gal. of water, for a total of 7.5 gal. of purified water additional packets can be purchased separately. Simple 4-step process provides you with 2.5 gal. of potable water in about 30 min. Kit effectively removes dirt, cysts and pollutants while killing viruses and bacteria. PUR packets contain calcium hypochlorite 0.542 2.168 ppm available chlorine.