A pipe can be carved out of many things. disposable pipes are good for when SWAN wants to take a fresh hit of hash and doesn't want to take the time to clean a glass pipe. and it was real handy when she had no pipe at all.
She joined two stalks of celery to make a tube.
she used tape to join them.
and she poked/carved a hole to act as a bowl.
it worked very well except that she didn't like the way the pipe rolled all around when she wanted to set it down, so next time she made a celery pipe, she carved a flat spot on one sde of the celery to act as a base.