Make a Bamboo Canteen
It only takes a little bit of work to turn a bamboo cane into a very practical canteen. To make a bamboo canteen you need to locate the largest bamboo you can find. Make sure that it is not split or damaged. Cut a piece of bamboo down. Cut or saw a section of the bamboo leaving a solid joint on each end. Pictured below: top, large piece of bamboo; bottom, one section cut out with end joints
Bamboo has a membrane that grows inside of each section. If the bamboo is dry this membrane will flake of and mix in with any water that you store inside the bamboo. You can remove some of the membrane by dropping a handful of small stones into the bamboo, adding a little water, and shaking vigorously. Pour the water and stones out and rinse. Personally, I don’t bother with this. You will never get all of the membrane out, and you will probably get some of the stones that won’t come out.