This thing will blow the top of your head off!! Or make a smooth hit, depending on your grip! You don't lip it, just rip it. Simply place a handrolled "cigarette" or pre-rolled cone in the metal insert, light it, screw the cap on, cover the carb, squeeze and get LIT!! These were around in the 70's, and drifted away. The Powerhitter Co carefully recreated it, and brought all the fun right back. These are perfect for when you wanna pass one around the circle, but don't really wanna lip the same paper as everyone else.  Refined when it was recreated with modern materials, it's very simple to clean.