Stainless Steel Polar Camel sports bottles feature double-wall vacuum construction and are built to last. It is 2X heat & cold resistant compared to a normal sports bottles. Double-wall vacuum insulation  The Polar Camel logo is on the top of the flip up spout. Seamless construction so there is no leak point. The hole on the lid is big enough for a straw. Polar Camels are made from 18/8 gauge stainless steel (18% chromium/8% nickel) - also  Type 304 Food Grade quality. The screw on lid features an easy flip top, soft rubber finger hold, raised ridges for easy opening and closing, and a rigid & removable straw for easy cleaning. Polar Camel Water Bottles are available in  16 vibrant Powder Coated colors!