This invention relates to a dry erase writing board. The housing is adapted to reside adjacent a terminal portion of an exhaust pipe so that pressurized air injected into the housing entrains the exhaust gases and disperses them from the housing. The switchable element can take a first and a second switching state, where a function of the diverting element can be activated depending on the switching state of the switchable element. The inserts preferably form the entire glass-contacting portion of the neck ring.