One of my favorite pipes I ever made was out of a coconut.
there are 2 ways..
First find a nice nut, it's better if it's kinda small and fits well in the hand, you will be poking out one of the three covered holes in the back so palm the coconut and find the best hole to use as a choke hole..
Once you have chosen your nut, choose one of the following methods..
Method 1: The long way but the coolest way..
Step 1.
Drill the choke hole out, drill a toke hole (in the opposite end of the nut from the choke hole, in the very pointy tip of the nut), and drill a hole for the bowl (on top of the nut while you're holding it with your finger on the choke.
Step 2.
Chuck it in the garden and leave it there for 3 - 4 months.
Step 3.
Grab the coconut from the garden and wash it out good, get all the bugs and dirt and old stuff out of it.. Use soap and wash it many times.
Step 4.
Insert your bowl in the top of the nut and smoke away!
Method 2: The quick way
Step 1.
Drill all your holes just like method 1
Step 2.
Using a good fine wood saw, cut the nut in half in the middle
Step 3.
Using a knife and a spoon, get all the meat out until you have just the wooden nut.
Step 4.
Sand the edges of the cut with rough sandpaper or a file to give it some texture.
Step 5.
Use a good wood glue and glue the 2 halves together, make sure you line it up so it is the way it was before you cut it.
Step 6.
After the glue drys, insert your bowl and smoke away!
Method 1 is better cause you don't get a seam, it looks better. But the results are the same..
After smoking through the nut for a while, it will darken from the resin and get a good stain from your hand oils and the resin. They look awesome after a while. I have one that's about 6 years old right now.
My dad has one from the 60's. It's almost black
As you can see, this is a method 2 nut, I have a couple others but this is my oldest.