Just fill up the water supply at the mountain stream? With the LifeStraw Flex Basic Kit this is no problem at all. The handy water filter is ideal for hiking, backpacking, camping, traveling and emergency use. The drinkable filter is designed to turn up to 2000 liters of contaminated water into safe drinking water. The kit includes the popular LifeStraw filter and a soft-touch drinking bottle into which the straw-like filter can be integrated. The LifeStraw Flex Basic Kit lets you sip from mountain streams without worrying about taking up too much space in your luggage.