The Cheech and Chong 15-inch Third Degree is a tall straight tube bong built for a clean, direct draw. The extra height gives the smoke more room to cool on the way up, and a removable diffuser downstem breaks it into smaller bubbles through the water for added filtration and a smoother pull. It runs a 14mm joint, the common size, so spares are easy to find, and the removable downstem makes cleaning simpler. It's built in borosilicate glass on a sturdy base. At 15 inches it's a full-size piece that holds up session after session. A solid pick if you like a tall, simple straight tube.