More and more is becomming known about plastic outgassing. Many people are becomming concerned about the contamination of products stored in plastic containers. This is especially true when these containers are exposed to sunlight. This not a problem generally with containers but supers are exposed. I have been searching for info on the net but none seems available. Does anyone have info on this? Is it a concern and what do you base your answer on? Is this a concern with food-grade polypropylene?