A gallon bottle filled with water with a hole in the top and a litre bottle with a hole in the bottom then tinfoil with holes on the top of the litre bottle.
To use it put weed in the tinfoil light it and very slowley lift the litre bottle up while its burning but dont lift it out fully then take the tinfoil off then put your lips on the top of the litre bottle then suck it out while pushing the bottle down then back up.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.