Straw Lid is leakproof and makes cold refreshment that much easier.Carry loop makes Straw Lid easy to transport and comfortable to carry.Made with pro-grade stainless steel to ensure durability, pure taste and no flavor transfer. stainless steel water bottle keeps beverages ice-cold for 24 hrs., and hot for up to 12 hrs. with double-wall insulation. This is BPA-free, food-grade water bottle .