Keep warm liquids warm, and cold liquids cold with this U.S. Military SG Water Bottle Parka. Protects and insulates a standard 1L plastic bottle for superior drinking in the most extreme conditions. Easily attaches to the outside of your pack, belt or vest to stay in easy reach every step of the way. As seen used by elite U.S. mountain warfare units. Made to incredibly tough U.S. military specs, by legendary supplier Outdoor Research.