Lock & Lock's revolutionary five-locking mechanism and resilient silicone seal keep food fresh longer without having to worry about any leakage. With storage saving design and also microwave, dishwasher- and freezer-safe. Lock & Lock is a convenient way to organize any kitchen. Passed leakage tests by authoritative local and international institutes and also passed strict hygiene and safety tests of U.S. FDA and German SGS. *Use and Care* Do not microwave empty containers. Be sure to open the lid prior to microwaving. The product is intended for reheating purposes only, not for cooking. To avoid pitting, do not reheat food high in salt, oil, fat or sugar. Avoid sudden temperature changes. Plastic is less flexible when cold or frozen and may break if dropped. Do not use abrasive cleaners or scrubbers.