Rather simple in design, but highly sophisticated in function: the JJ "Boomerrang" bong cooler is available in the two most important cut sizes 14.5 mm and 18.8 mm.
The special feature of this cooler are the three circularly arranged rod percolators at the bottom of the chamber. These ensure the best turbulence and thus ideal smoke reduction and significantly less scratchiness.
A separate inner chillum is not needed, as this is already firmly integrated between the percs and the top cut. However, a bowl is still necessary.
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