word:     Ice Catcher

An ice catcher is a structure that holds ice in place at a critical point in a pipe, usually near the mouthpiece, where the smoke stream is about to be inhaled. GRAV® has developed an entirely new form of ice catcher: the geometric ice pinch. The pinch is made by pressing a trapezoidal tool into the outer wall of a water pipe between the base and the mouthpiece while the glass is still hot. The pinch creates a shelf that's big enough to hold ice cubes but small enough not to obstruct the smoke stream. Its sloped edges allow water to flow back into the base of the pipe, doubling as a splash guard.
Tags : Pipe Anatomy