There is an inner chamber inside the glass bong that prevents you from clearing it 100%.There is an inner chamber inside the glass bong that prevents you from clearing it 100%. You leave a good amount in the chamber. Which makes the water dirty faster.

I had high.. hopes. I cannot clear the chamber. It always has a residual of smoke on every draw. My brother bought the same pipe and his does this too. You still get a pretty good draw but you cannot judge your hit with the smoke left in the chamber. Bummer!!!!