A bidon is the technical name for the specially contoured bottle designed to strap to the frame of your bike. As with many things cycling-related, the word is French, and also like many cycling concepts, it has been refined and improved over many years.
The ASSOS SIGNATURE Bidon features an unmistakable EQUIPE RS griffe pattern, and is BPA-free. Its wide-mouth cap makes it easy to fill, and for you to take drafts from when riding at speed. Yet your racing hydration stays firmly inside, thanks to the firm-closing top.