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Old fashioned bongs are delivered without any special gimmicks, but only with the most important parts like a bowl and the downpipe. There are e.g no screens for the bowl. Also extras like pre-cooler, diffusor or even a percolator are not part of the usual pipe. Especially if you going to buy a budget bong. These pipes are rather recommendable for purists, traditional smokers or even beginners trying to avoid to start with an expensive bong by financial reasons. If you want the most effective and smooth smoke you have to go to the „advanced“ category.

Icebongs

The most simple way to cool smoke is a bong with ice carbs, which are typically designed just below the mouth piece and provides the option to fill in some ice cubes. Smoke will be inhalted through these cubes and will give the effect of a very fresh expierience. Take attention about the size of the cubes – got to fit in the very bong – and that the cubes shall be removed after smoking to avoid a flood after melting (particular if you have a pipe with shothole). If you bong does not provide this possibility, it is possible to pimp you pipe with separate add-on for ice cubes.

Downpipes with diffusor

If you dont want to add ice, the using of a diffusor downpipe would be the next step. The difference between this kind of chillum and common ones are the closed bottom part with holes to allow the smoke to whirl. By this, the smoke will be freshed up with oxygen to reduce the effect of scratching in the throat and annoying coughing fit. On the other hand, a diffusor will reduce the „kick“ of smoking and is much harder to clean as usual downpipes (but you wont have as much dirt in the bong itself).

Bongs with inline percolators

Bongs with inline percs are using the very same physical principle as a diffusor, differed by the fact, that the smoke wont be whirled in the first step (downpipe) but after it leave the water.
The advantage is the possibility (depends on the bongs size) to use more than only one perc-reactor. There are many pipes are equiped with up to 3 pers in row to provide best effect.
Friends of shotholes will be disappointed. There are no holes to add oxygen during smoking, but it would be useless by the nature of the perculator system. There is one tear on this soup: perculator bongs are rather hard to clean and comparatively easy to destroy. Handle with care !

Pre Cooler

In most cases, pre cooler are add-on to mount between bowl and chillum, but there are more than one producers adding this feature to the bong itself. It is of easy principle: a second water tank will be placed before the chillum to a.) expand the load of water and b.) have a separte dirt/ash catcher. Maybe to most effective kind for smoothing your smoke.