Some Sunset Harbor Flake in a very old knock around pipe made of a dubious wood I bought out a 10 dollar bin at the local B&M. The pipe has been a dog for years and gurgled constantly and smoked so hot you could hardly hold it. I basically use it to "test" suspicious tobacco now a days. After reading a couple of threads about counter sinking the tenon, I went ahead and tried it on this old guinea pig. So far, no gurgling, still hot to the touch though.