Safely and securely carry your favorite beverage. Flask holster mounts as standard water-bottle cage on your bicycle, for carrying non-standard liquids. This is how we carry that "other" type of energy drink. The Flask Holster is articulated to fit the curvature of the flask, so a flask fits in only one direction. Ahearne Cycles only promotes responsible drinking and safe cycling practices. Have fun, and ride safe!
The only difference between the 6 oz. and the 8 oz. flasks, dimensionally speaking, is the height.