As far as I can tell, all of the nebulizers (that is the cup and mouthpiece) that are meant for reuse over a period of time can be sterilized - either in boiling water or a baby bottle sterilizer. Even without MAC "on the menu" we have always (40 years) sanitized ours. Those labeled for "individual use only" "single use" or disposable will melt.

I buy generic reusable ones from a nebulizer supply company. Just ONCE I tried to get them cheaper by buying from a non-medical supply. They were labeled "reusable" and melted. Lesson learned.