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The Einstein bong is a very intricate bong consisting of five chambers in total. That's a lot of smoke filtering and tar reducing which means an especially smooth and clean hit.
The metal downtube and bowl slot into the ashcatcher chamber at the front. The smoke would then travel through the ashcatcher into the main chamber to be dispersed into the two outer chambers at the sides of the main base before going through into the final mouthpiece chamber to be inhaled.
It's not quite e=mc2 but it sure is one of the smoothest hitting bongs available today.