Item Code: S21SX162Stay hydrated out on the hills or when you're around town with this portable 21oz standard water bottle from Hydro Flask. Insulated Hydroflask 21oz bottle, double wall insulated. Keeps cold for 24 hours or hot for 12. TempShield Protected  Keeps cold up to 24 hours  Keeps hot up to 6 hours  18/8 Pro Grade Stainless Steel  BPA-Free  Durable, sweat-free powder coat finish  Volume 621 mL 21oz Standard Flex Cap - Fossil