Every device used for smoking grass has the one problem of wastage.
No matter how fast you smoke it, about half of the smoke is dissipated into the air, and thus lost forever. The Tandyn Slave-Master, however, has done away with this problem by allowing you to save every bit of the smoke. Although this device can be easily and cheaply built it is a little complicated to explain so please refer to the illustrations on pages 114-15 . On the left is a normal water pipe such as the one we've just described, except that it is connected by a glass or rubber tube to the ineinerator on the right. His air goes into the incinerator forcing that air out into the other tube.