So I tried to make this once but had problems with the top chamber being sealed enough to hold the water in. Another problem I thought might happen is that the bag for the lung won't be able to suck enough air in to fill the chambers through the water. However, if it's completely sealed that shouldn't be a problem right? Posting this here for revisions/ideas to make it better if it is even possible. The pic is kind of sketchy, I drew it out for a friend but hopefully you get the idea.
I used to have a gravity bong with a downstem going into the water from the top. It diffused about half of the smoke through the water, but it still made the smoke noticeably smoother and still got me baked. The downstem fit perfectly on top of the opening of the two-liter bottle too so it was airtight. Gravity bongs ftw.
That's just uncanny... about 5 minutes after posting this I cut slits into a straw and stuck it into the small bowl we have for the gb! But yeah man, gbs are an incredible invention.
Hah, that works, I just looked around and all that I could find were straws! And i guess one kind of fat rubber tube would be easier to seal then trying to join a number of straws at one point. Thanks man!
