Lock & Lock containers lock tightly to keep refrigerator odour out and keep food fresh. Good for storing various sauces, leftovers, canned goods, fruits, and vegetables. Refrigerator, freezer and microwave safe. Useful for other range of purposes as well. Lock & Lock are the No1 Globally recognised product. The major problems with traditional air-tight containers are the lack of air-tightness and inconvenience of opening and closing lids, which have both been improved with Lock & lockâ€TMs 4 side-locking system. One of the most important features of Lock & Lock products is the permeability of the container that keeps the freshness of the food rather than using an additive. The permeability of Lock & Lock products, in comparison to other brands, testing showed 200 times better at the most. The difference with Lock & Lock products to other similar four side-locking products is in the inside of the silicon. Lock & Lock silicon has a hollow inside, giving superior compression and restoration power for airtight lockage. Lock & Lock is friendly to the human body and have raised the standard of safety and functionality using superior raw materials with durability and heat-resistance. Lock & Lock was awarded the â€œQuality certificationâ€ (Q Mark) and the â€œHygiene and Safetyâ€ (HS Mark) by the Korean Environment and Merchandising Testing Institution (KEMTI) as well as the â€œSanitary Finishedâ€ (SF Mark). In addition, Lock & Lock passed the strict hygiene and safety tests of the U.S. Food & Drug Administration (FDA), the German SGS etc.