are pax 2 and 3 the same size?
PAX 3: What They Have in Common. ... Mouthpiece types: PAX 2 and PAX 3 come with two types of mouthpieces constructed of food-grade silicone: a flush mouthpiece and a raised mouthpiece. Same size: PAX 2 and PAX 3 boast the same streamlined and sleek design that puts discretion first.