Uninvited, this problem is actually very simple, the key is that each plastic application field is different, the cost is different. Security is the same. You also mentioned that PP is microwave heated, and yogurt cups and food trays are PS and PET. Yes,PP is the only plastic that can be heated with food, why? Because it is resistant to high temperatures of 120° and does not release harmful substances, PET and PS are not able to withstand temperatures of about 70°, so it is used in other fields in addition to microwave heating. Safety is the same, the key is just to see how you use it, normal use is no problem, but you must take some non-temperature-resistant plastic to heat, thus releasing toxic substances, it is definitely killing. Existence is reasonable, each plastic product has its positioning, must not be insurmountable, rest assured to use it! Above!
