The Colton Copper Vacuum Insulated Bottle 20oz is constructed from durable stainless steel with a silicone gasket to help keep its contents secure. It features double-wall construction with copper vacuum insulation, keeping beverages cold for up to 48 hours or hot for up to 12 hours. The Colton 20oz has a durable powder coating that prevents condensation from forming on the outside of the bottle. For added convenience, this item comes with a screw-on spill-proof lid and has a metal handle for easy, comfortable carrying. Plus, its wide mouth opening makes the bottle simple to clean and refill.