What are my SMEG food storage boxes made of? Patricia 1 month ago Updated The food storage boxes are made of a plastic called Styrene acrylonitrile (SAN material). They are made in Italy. Related articles For what can I use my storage box? Can I buy the products online? How to use the mini cocottes? What are the proporties of SAN? Can I use my SMEG stoneware ovenware in the oven?