Hydro Flask 40oz Wide Mouth Water Bottle + Flex Chug Cap White, One Size

We fill Hydro Flask's insulated 40oz Wide Mouth Water Bottle with ice and water for sweltering summer hikes or piping hot tea for cold ski tours. Its TempShield insulation keeps water ice-cold for up to 24 hours, and it keeps hot drinks steaming for up to 12 hours. Hydro Flask gave this model the Flex Chug Cap to provide a convenient, controlled flow, and the wide-mouth cap easily fits ice cubes to keep things cool.