It's a kind of gourd. Couldn't put that on FB because gourde is the equivalent of the English dumb cow.
Yebbut a gourd in French is a
courge, which has no negative or offensive meaning. A
gourde is basically a water container made from the stomach of a dead animal, but some people use it for any water container. For the reason you mention, I hate when local cyclists use
gourde for a water bottle. I can't resist the urge to tell them No, it's not a
gourde, it's a
bidon!
A