Materials: Polyethylene. Structure: single layer. Max volume: 10 liter. Operating temperature limit: -30 to 60 °C. The number of sheets: 1 piece. Dimensions: 0.2 mm in thickness × 400 mm in width × 550 mm in height. Detail: if you pour 10 l of water into the bag and lay it on its side, you can store water without leakage thanks to the new type of clack (or stop) valve. The new valve was formed by only one shot of heat. The bag passed the water quality test (you can store tap water in the bag in a dark place for up to 3 days). The bag is made by polyethylene used for food and adapted to The Ministry of Health, Labor and Welfare.