This will appeal to 14 year old boys and girls. The same way they have the candy that looks like a pacifier...etc.
It is a gimmick that will appeal to some. But you won't see adults with them on airliners...
Did you know eBay was started as a venue to trade nothing but Pez dispensers?
(Hint: Those enterprising computer geeks weren't 14.) Anyway, that left me with the impression that there must be a fair number of adult Pez dispenser collector-fanatics.