The Boulder 10 Flask holds 10 fl oz, has a shatter-resistant body with bumper, graduations, and a hinged silicone cap making it impossible to misplace.

• Shatter-resistant, copolyester resin body and grippy, silicone bumper mean this flask can go anywhere
• Wide mouth makes for easy filling, pouring and drinking
• Hinged top with silicone grip is easy to open and impossible to misplace
• Convenient molded graduation marks
• BPA Free
• holds 10 fl oz; weighs 4.1 oz