This range of SMARTSEAL FOOD STORAGE CONTAINERS is made of top quality polypropylene and carefully-selected non-toxic Thermoplastic Elastomer Rubber (TPER) materials that comply with international safety standards and they are certified by Food and Drug Administration (FDA) as well as Korea Environment & Merchandise Testing Institute (KEMTI) for hygiene and safety. These food storage containers are specially designed with various unique features to meet consumers’ every need. These airtight and leak-proof SMARTSEAL FOOD STORAGE CONTAINERS are also ideal for packing lunch to school, work or keeping foods fresh for picnics or outings.