SWIM found this the other day, and decided to give it a try.
http://www.authorsden.com/categories...id=10&id=31395
This can be modified to use a large piece of bamboo for the chamber, as well as bamboo for the stem and mouth piece. SWIM used a coconut for the chamber, and bamboo for the pipes. He also prepared a clay bowl from local clay he found on a riverbank. This is his improved method.
1. Find the "mouth" and "eyes" of the coconut, and poke a hole through the mouth. SWIM found that it was actually soft enough to use his finger. Drink the milk, its good for you then proceed to use sand paper to widen the hole. Do this with the "eyes" making sure not to get carried away, as we will not be using any sealant or glue if you get it too big.
2. Now, use a flathead screwdriver to remove the meat from the inside. This is a lengthy and delicate process, as you do not want to crack the shell. He finds that leaving it in the sun dried out the meat, making it easier to extract. He also rinses it with water to remove the meat, but dries it out so that it does not go sour. Make sure to get it all. It will smell really funky(like brie) if you don't get all meat out. He then sands the outside until smooth.
3. Now, once the coconut is cleaned and dried measure the stem for the bowl. He notices that bamboo has a slight taper to it, so skinny end down will give a snug seal. He used the "mouth" for the bowl, as it is the strongest hole. He then sands the nut and twists the piece in, so that it seals tightly. He then does the same thing with the mouth piece, making sure to cut a taper, so that it does not slide in too far, nor fall out. Do not worry if there are small holes, the resin will take care of this.
4. SWIM's bowl is homemade, in the manner of a chillum, and is fitted snug with thread.