The IceFlow Flip Straw water bottle by Stanley is made from recycled stainless steel with double-wall vacuum insulation that keeps water cold for hours. AeroLight™ makes the bottle 33 % lighter than standard stainless steel bottles. The lid has a built-in straw and a larger drinking opening for quick and easy sipping. The bottle is leakproof, has a practical carrying handle and fits in cup holders. A practical water bottle to take to your workout or on the go.