Thermos Funtainer Stainless Steel Vacuum Insulated Straw Bottle - Monster High, 12 oz/355 ml (Black) Thermos double wall vacuum insulation for maximum cold temperature retention Unbreakable stainless steel interior and exterior, made from bpa free materials Hygienic push button lid with pop-up straw Keeps contents cold for 12 hours 12 oz (355ml) capacity