Cap body: A short cylindrical cap with internal threads that screws onto the mouth of a beverage bottle, serving as the fixed base for the whole assembly.
Short bowl: A flared bowl extending diagonally from the top of the cap â the rim flares outward and the inner cavity is recessed. It holds the shisha tobacco and foil, and sits above the water path.
Long tube: A slender straight tube extending diagonally in the opposite direction from the short bowl, with the end narrowed into a mouthpiece. Its length is clearly greater than the width of the bottle, so the bottle does not block the view while smoking.
Downstem: A thin tube running vertically from the base of the cap down into the bottle, open at the end. During use it is submerged in water to provide water filtration.