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.

The Medium Gravitron comes ready-to-pack with a 14mm Funnel Bowl. Already have a bowl you love? The standardized 14mm joint is compatible with any 14mm male bowl.

The best part? The hits. Fill your Gravitron with thick, milky smoke and let gravity do the rest. The pressurized hits are effortless and smooth.

And all that power comes with zero waste. Since your smoke is contained in the bottle, nothing is lost. Maximize every last nug and conserve your bud.

When the party is over (for now), the simple design and straight sides make it a breeze to clean.

To use:
– Fill the base about halfway with water.
– Pack the bowl with dry herb and insert it into the joint at the neck of the bottle.
– Light the bowl and lift the bottle at the same time. Don't lift the bottle all the way out of the water, or you'll lose your smoke.
– Once the bottle is full of smoke, remove the bowl and place your mouth over the neck, inhaling as you lower the bottle. The Gravitron will give you a dense, pressurized hit with no loss of smoke in the process.