Hydro Flask 40 Oz Wide Flex Cap Dew 40 oz. The Wide Mouth bottle design features an elevated silhouette and a simplified design without compromising performance. The Color Last powder coat is dishwasher safe for even more convenience. Cold stays ice cold for 24 hours and hot stays piping hot for 12 hours. Specifications for Hydro Flask 40 Oz Wide Flex Cap: Manufacturer: Hydro Flask Fabric/Material: 18/8 Pro-Grade Stainless Steel Volume: 40 oz Capacity: 40 oz Package Contents: Hydro Flask 40 Oz Wide Flex Cap Hydro Flask W40BTS441: 40 Oz Wide Flex Cap Dew 40 oz