This 27 oz double-wall vacuum mug is made from 91% recycled stainless steel and 100% recycled polypropylene, including the handle, lid, and straw. It features a silicone-tipped straw, a versatile screw-in lid with both a drinking spout and straw, and a twist plate with silicone spill stoppers to prevent leaks. Interior volume markings help track your liquid intake, and it is not cup holder compatible.