bpa free meal prep containers: At present, most of the plastic lunch boxes sold on the market are polyethylene and polypropylene products, these two substances can withstand high temperatures above 100 ° C, and are safer to use, consumers should pay attention to whether the product is marked PE(polyethylene) and PP(polypropylene) words, the most common "5" represents "polypropylene", that is, "PP" material. The temperature range of this PP material is -20 degrees - 120 degrees, which can be applied to microwave heating. Previously, it was said that among all the plastic lunch boxes, only the lunch box labeled "5" (PP material) can be used for microwave heating and is very safe. But PP material also has different levels, pure PP material plastic lunch box is very safe. How to identify whether PP material is pure? In addition to looking at the brand and related test reports, it can also be identified by the following methods: 1, smell: if there is a pungent plastic smell or taste after water, basically there is a problem. 2, look: Compare similar lunch boxes together, the more transparent it will be more pure. 3, pinch: you can pinch the toughness of the product, too brittle too thin can be eliminated; Check to see whether the product's identification diagram and identification are clear, and whether the plastic box body and box cover have corresponding material markings.
