Zeitgeist wears a green mask over his mouth to avoid accidental spewing.
History[]
Deadpool 2[]
When not in battle, Axel Cluney is seen wearing a special protective mouthpiece, so that he doesn't inadvertently spray all over those around him. The continual presence of that item indicates how Axel's everyday life is impacted by the bizarre capability he never asked to have. This special mouthpiece is made from an unknown material similar to plastic but much stronger.