Soft plastics often contain evil toxins such as Phthalates. I suspect that mouthpeice, which you melt to fit your mouth is a likely candidate for these toxins linked to all sorts of health problems.

Any non plastic high quality mouthpeice?

What did people use for mouthpeice before plastic?

Like old boxers for instance.

Here is a well done article which hits on not only Phthalates, but other toxins we are exposed to.

http://www.truthdig.com/report/item/...4_toxins_r_us/