![]() Here’s how the bucket-style gravity bong looks in action: This one is a little less likely to spill all over the floor, but if it does, it makes an incredible mess. When you think of a gravity bong, most people will picture the kind that uses a big container of water - as small as a pitcher or as big as a swimming pool - and a bottle with the bottom cut off. The more traditional gravity bong isn’t much better, though. Long story short, it requires a lot of setup and leaves you with a bottle full of smoke that rapidly gets stale as you suck on it and cough your lungs out. Second, you need tape or a plug to cover the hole at the bottom of the bottle until you’re ready to rip it. ![]() First of all, the water has to flow somewhere, and if you’re indoors, you’ll need a sink or bucket to catch the outflow. It works pretty well, but the problem with this method is that it usually makes a huge mess. 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. 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. 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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