With a slightly bent neck, this 'meshugga' glass bong provides an excellent draught. This is due to the large diameter (approx. Ø 15mm) of the down-pipe which is somewhat widened at the upper end, forming a chamber. And by inserting a stable sieve (eg. either 44 05 24 or 44 05 44 05 25), an active carbon filter can be fitted producing an active carbon chamber. For extra comfort, the mouthpiece has a smaller diameter glass rim at the end of the tube. The bong bowl has a 'Roll-Stop' pimple to prevent it from breaking.