The big difference is that instead of falling into another container, the water just exists through a hole in the bottom of the bottle. And the only place for the air to enter is through the lit bowl, which fills the bottle with smoke. Much like the Stundenglass pipe, as the water leaves the bottle air must enter to replace it. One style, which some people refer to as a “waterfall” gravity bong, uses the negative pressure of water falling out of a bottle to pull air through the plant material and fill the chamber with smoke. For anyone who didn’t smoke pot out of discarded food containers as a young person, here’s how gravity bongs work: It also combines the principles of both styles of homemade gravity bongs to pull and push smoke, whereas your trashpipe probably just did one or the other. This design is much more slick - and much less of a mess - than the waterfall-style or bucket-style gravity bong you may have built in your garage or dorm room, either of which probably got water all over the place. Then, as you turn it back over, the water falling back into the smoke-filled chamber pushes the smoke back out and into your face. Stndenglass hourglass in German and owned by vaporizer company Grenco Sciences takes that ingenuity and creativity to another level with its gravity hookah, made of borosilicate glass and aircraft-grade anodized aluminum.
Rogen’s device, made by the company Stundenglass, uses the negative pressure created as water falls from one chamber into the other to pull air through the burning plant material, replacing the empty space with smoke as the water vacates it. Making your own grav bong is easy in theory, but there’s a level of MacGyver-ing involved that leads to creations and innovations with objects as simple as the bottle (milk jug, Hawaiian Punch bottle) or larger water receptacle (bucket, plastic bin).
And the physics of a gravity bong is actually pretty simple. Even if you don’t smoke, this video of the comedian using this bizarre device, which climbed near the top of the r/interestingasfuck subreddit on 4/20, is mesmerizing.īut, you’re probably wondering, how does this monster work? While it looks complicated, the answer, as is the case with most ridiculous smoking devices, is physics. Many a high school smoker has built a gravity bong on the back porch to get stupid high on some mid-grade marijuana, but whatever contraption you rigged up with hot glue and soda bottles probably didn’t hold a candle to Seth Rogen’s sophisticated piece of equipment.
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