Includes 4 containers: 13 x 9 x 6 cm (350 ml), 17 x 11 x 6 cm (500 ml), 19 x 12 x 6 cm (800 ml), 22 x 14 x 7.5 cm (1200 ml). 4 different sizes to meet a variety of needs, ideal for picnics, travel, work, and more. Ingenious design: lid with 4-way click closure and leak-proof silicone sealing ring. Each container features a small valve on top for water vapor release. Folds down to 1/3 its original size for compact storage, saving over 60% space. Safe for use: Suitable for microwave, dishwasher, and refrigerator. Temperature range: -40C to 120C. Open the vent valve when heating in the microwave, and do not exceed 5 minutes of heating time. Ideal food storage: Perfect for storing food. Easy to assemble and carry, making it a great lunch companion for kids and adults alike. Supports healthy eating habits and makes a thoughtful gift.