The best filtrating bong I've ever smoked is my most recent
creation--the triple-chambered bong. Yes, it is smooth as shit--I
blow out huge clouds without feeling any irritation on my lungs.
Do it yourself: use three Mickey's Malt Liquor (wide-mouth)
bottles and some 1/4" clear plastic tubing (hardware store). I
strung my bottles together in series, meaning that the bowl on the
first one is connected to a stem (3/8" plastic tubing) that
plunges down to the bottom. Another hole in the cap lets a second
tube draw the smoke out of the first chamber and channel it to the
bottom of the second bottle. The same thing again--another tube
draws smoke out of the second chamber and pulls it down to the
bottom of the third chamber. A fourth tube is the sipping tube to
inhale the smoke from the third chamber.
The tradeoff is that it is a little harder to pull the smoke
through this bong that through a standard Graphix, especially if
all the bottles are more than half-filled with water. I sealed all
the joints with silicone, so it's surprisingly tight and easy to
pull, given the length of the draw and the weight of the water.
The bonus is that I usually put boiling-hot water in the first
chamber, with iced water in the second and third chambers. Don't
try this with plastic chambers!
If filtration is not that important to you, just make sure the
smoke bubbles up through at least a half-inch of water
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