The first food containers were invented by the American Earl Silas Taper in 1946 thanks for this info this blog storageboxreviews. For a while, they were not in demand and became widespread only in 1948 under the name Tupperware. Today it is a fairly well-known brand of high-quality plastic tableware.
Unfortunately, plastic containers that fill store shelves do not always have high quality characteristics, and many are even harmful to health. American and Canadian scientists, for example, have found that 95 percent of baby plastic bottles made from polycarbonate plastic and most similarly manufactured food containers contain bis phenol. As long as cold food and drinks are stored in such a container, it is safe. But when heated, polycarbonate plastic releases a dangerous amount of bisphenol, which goes into food.
Scientists call bisphenol among themselves a synthetic analogue of estrogen - the female sex hormone. Having similar properties to this hormone, bisphenol has an effect on the reproductive system and the brain. Studies by American scientists have shown that such an effect sometimes turns into oncological diseases of the mammary glands or prostate, mental retardation, autism - in the case of children.
But scientists at Harvard University have empirically proved that after a week, during which a person consumed cold liquids stored in plastic, the level of bisphenol in his urine increased by almost 70 percent.
Laura Vandenberg is also against food from plastic containers. As a professor at the Health and Environment Department at the University of Massachusetts, she dealt specifically with this issue. According to the scientist, not only the food that was cooked or warmed up in plastic dishes is harmful, but also the food that was cooked near it. She called bisphenol A and phthalates the most poisonous substances that penetrate into products during the heating period of plastic.
Alan Aragon is one of the leading experts in the United States on healthy eating. With regard to plastic dishes, his main postulate: in no case should you heat food in it. In his opinion, scientists have not yet fully studied how harmful food heated in plastic can be and what consequences this will ultimately lead to.
For the sake of fairness, it should be noted that in Europe the Food Safety Agency is very favorable to bisphenol A. They believe that this component is easily excreted in the urine. In response to this, Laura Vandenberg shows the results of scientific research, according to which both bisphenol A and a number of other components that successfully migrate from plastic to food, negatively affect hormonal levels, contribute to the development of cancer, diabetes and obesity.
Knowing how to use plastic dishes is a whole science. Few people pay attention to the stickers on the back of the containers. For example, the numbers there indicate a type of plastic, and the triangle sign with an arrow indicates the suitability of the material for recycling. We saw the crossed out skull and bones - which means that food cannot be stored in such a container under any circumstances.
The designation 2 HDPE indicates the safety of plastic containers, but food cannot be heated in it. If you plan to reheat meals in plastic, look for the 5 PP designation - heating up to 150 degrees Celsius will not threaten you, but only the food should be low-fat. And it is unacceptable to drink alcohol-containing drinks from plastic with this designation.
1 PET, 4 LPDE, 6 PS, 7 OTHER are considered relatively harmless. You can safely put breakfast for your child in any of these containers. Heating is not provided at school.