TempShield double-wall vacuum insulation Flex cap is leakproof when closed Honeycomb insulated cap Made with 18/8 pro-grade stainless steel Color Last powder coat is durable & sweat-free BPA-free & dishwasher safe Stainless steel, insulated, refillable, reusable. This wide-mouth water bottle is the flask to grab to keep drinks cold for 24 hours and hot for 12 hours. The large opening makes it easy to add ice and get yourself a bigger gulp. Fill up for your next adventure.