The Medium Gravitron is the smaller version of the best-selling Large Gravitron. With this classic design, gravity and pressure work together to give you huge, efficient hits. But unlike homemade gravity bongs fashioned from soda bottles and buckets, this sleek glass gravity bong keeps things clean and classy. And the medium size is ideal for personal use or sharing with a friend or two.

Originally released in 2004, the Gravitron has been—dare we say perfected?—in recent years. The base and bottle are both made from the highest-quality borosilicate, a hefty 5mm thick. At the bottom of the bottle, a platinum-cured silicone grommet protects the glass where it connects with the base. Up top, a hefty flange is easy to grip for smooth lifting.