"The HSC500 offers a top tube mounted flask with twice the capacity of the smaller HSC250. It's aimed at athletes using liquid nutrition over longer distance events where steady fuelling is essential. Allows for bottles to be used purely for hydration.

The bottle is easy to squeeze; with a shape engineered to minimise aerodynamic drag. The cage is designed to hide the nozzle from sweat or anything else that drips down; to avoid contamination.

Specifications

Volume: 500ml, Length: 330mm, Width: 46mm

Bolt Spacing: 64mm, Weight: 179g" - Profile Design