Features: brand new and high quality 304 stainless steel material, not easy to rust, thick and durable, corrosion resistant and easy to clean. The metal material is uniform and rapid cooling, which is more suitable for the refrigerator to isolate the air and seal and lock the for fresh. Sunken lid design, no longer slipping when placed. Four-sided lock design, built-in thick silicone ring, sealed and leak-proof, more convenient to carry out. No dead ends, easy to clean. The curling design is safe and does not hurt your hands. Specifications: Material:Stainless Steel Color:As the Picture Size: Approx. 15.5x8.5x4 for cm/6.1x3.35x1.57 inches（220ml） Size: Approx. 15.5x12x5 for cm/6.1x4.72x1.97 inches（600ml） Size: Approx. 22x16.5x7 for cm/8.66x6.5x2.76 inches（1500ml） Size: Approx. 27x20x8 for cm/10.63x7.87x3.15 inches（2900ml） Package Includes: 1 x Lunch Box note: 1.Please allow 0-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3.Other parts are not included. Thanks for your understanding.