Lunch boxes are like socks, even if you try to pay close attention to them, the lids and containers ^ will eventually appear "variation" because you don't pay attention. So far, there are many kinds of fast food boxes that are entering new markets, and the market is popular with a variety of colorful plastic lunch boxes. When buying, you need to pay attention to all the lunch boxes. Is there a mark "no BPA" on it?

The “BPA-free” label means that the product does not contain bisphenol A, a synthetic compound associated with a range of health problems, from cardiovascular disease to brain dysplasia and increased risk of certain cancers; BPA is used in the plastics industry ^ One of a wide range of chemicals, from dental sealants to cash register receipts and tin can liners.

But there is growing evidence that BPA-free products are safer than their replacement hard plastics, and some studies have shown that some chemical alternatives may be more effective than BPA.

In 2008, Health Canada made headlines worldwide by banning the sale of polycarbonate baby bottles containing bisphenol A. Canada further announced BPA as a toxin in 2010 (the name allows the government to develop regulations on the use of chemicals).