Inhalater does have a glass capsule. There was an hourglass shaped shorty, and there is a long glass high quality capsule. In all cases with Inhalater, the capsule IS the air path. I do not use my glass capsule often for the Inhalater, for reasons of cleanup.. (I am compulsive about it). The Polymide is so simple to maintain, I only use the glass when I am doing some serious "flavor grabbing".