GRAV 11" Gravitron Gravity BongThe first affordable all glass gravity smoking system ever made, The Gravitron is a great gift for any customer, entry level to aficionado. Widely known, The Gravitron is the most efficient smoking device on the market. No smoke is lost because it is contained within the inner chamber and consumed without leaking. Extra heavy glass makes it a super durable piece. The custom box makes the Gravitron easy to move around with a cut out handle for