"Bidon” is a fancy French word for container. “Utilisateur de drogue” is French for those who cheat the system, cheat those who ride clean, just plain cheat. We digress. butter’s bidon is an honest approach to keeping clean…hydration at your fingertips. butter collaborated with the one and only Angry Bovine creative studio to design this 22oz BPA-free, Specialized Purist bottle with translucent MoFlow cap. Ergonomically tooled for left- or right-handed riders.