Grav | Medium Gravitron

- Made from durable, heavy-duty 5mm borosilicate - Closed system keeps smoke contained and conserves bud - Platinum-cured silicone grommet protects glass touchpoints - Sleek design is super easy to clean - Includes a 14mm Funnel Bowl The original glass gravity bong in a compact package. 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.