Gravity Bongs: Reusable Smoke?

[ihateapplesandsalt]

what is a fuckin lung bong?

I believe it's a halved 2-litre with a plastic bag on the bottom. The idea is that you pull on the bag to draw in the smoke...I think.

ihateapplesandsalt Reviewed by ihateapplesandsalt on 05-05-2005. 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