Oh gosh. Gravity bongs are amazing. I hit it after drinking a 40 and I was fucked.
mortalbic Reviewed by mortalbic on . Gravity Bongs: Reusable Smoke? I just tried a gravity bong and it's now definitely my favourite smoking device. The equivalent of half a joint is all I needed. In any event, after taking a hit I wondered: "If I exhaled back into the bottle could I keep doing that and reuse the hit? I figured this was too good an idea to work, so what's the problem with it? I guessed either Carbon Dioxide buildup or loss of smoke potency after the first hit. Rating: 5