This item has been unused and stored at home. It breaks down ethylene gas, a substance that accelerates deterioration, and oxygen, which causes oxidation, into the inert gas carbon dioxide and water to maintain freshness! Furthermore, its antibacterial action suppresses the growth of mold and decay bacteria. For preserving the freshness of vegetables and fruits. - Brand: True Fresh - Size: 590ml, 930ml, 1.04l ✖️ 3, a set of 9 pieces. - Material: Polypropylene - Heat resistance: Body 120°C, Lid 70°C - Cold resistance: Body -20°C, Lid -30°C Thank you for viewing.