What is important to eat, what to preserve food can not be too casual. Recently, the German propaganda and cultural life in the kitchen of OKO-TEST contest ended. It is reported that one of the major contents of this selection is the closed airtight container, durability, ease of comparison in 12 aspects of testing. Reporters learned that, to this selection from Germany, Italy, Sweden, Korea and other countries produce 15 kinds of airtight container for the objects examined for its tightness, durability, convenience and other 12 aspects of comparative testing and analysis. Among them, the well-known South Korean brand Lock & Lock is surrounded by its strict lock and seal ring hollow, and the use of PP material, can withstand -20 ℃ -120 ℃ temperature changes, etc., get the best of this selection level. Plastic containers for these characteristics by the affirmative, executive vice president of the International Food Packaging Association, said Dong Jinshi agree. Dong Jinshi recommend using the microwave oven to consumers with PP plastic containers, because "the only plastic containers in microwave heating, the material code is' PP ', numbered '5', should be qualified on the container the corresponding identity for the public identification, we drink the cup it's best to use with this material. " Our plastic containers are produced with 'PP' made​​, please user ease of use.