Plenty of chemicals in cow poo , especially if they have been fed with clenbuteroli dont have a problem with just saying water bottle. i mean calling it a bidon is a blatant attempt to sound like a tour de france rider, in which case, have you got any spare performance enhancing chemicals?
It's a French word, regardless of its inclusion in the OED or not. Not sure about its 'regular' usage though - the only times I ever see it being used is on cycling forums.Bidon is in the OED and is used regularly in the English language whatever the origin. Why the question?