Plastic products to hold food, may lead to cancer, children with precocious puberty, damage to the central system and liver and so on. 1. Lead to cancer: plastic products contain a carcinogenic substance benzo(a)pyrene, food and plastic bag contact, food will also contain this substance, of course, this is a slow process. The more contact, the greater the possibility of cancer. 2. Lead to precocious puberty in children: plastic products in certain conditions such as high temperature or acidic (alkaline) environment, there is a di-phthalate component escapes, the child excessive exposure to this substance, will cause endocrine disruption, precocious puberty. 3. Increase the chance of damage to the central system and liver: phthalates in plastic products, if loaded with food, may damage the central system and liver. Food, must be used in accordance with national food packaging standards of materials to ensure safety.