A gourd... such an odd crop. Sure you can make lot of things from gourds, but a canteen; now, that's a good idea. This natural plant has been around for a long time. It was found at various archaeological sites dating back as far as 1300 BC. Commonly used at Black Powder Rendezvous and living historyreenactment events to store water or wine and to use as a drinking canteen. Sizes and shapes will vary a bit.