Is there any substance that is released when the sun or some other heat source heats a plastic bottle (e.g. PET)? Are these substances dangerous to human health?
A note about materials: I don't know the differences between PET and other kinds of plastic like polycarbonate, so if there are any differences regarding exposure of different kinds of materials (used for food and beverages) to sunlight, please feel free to add as much information as you feel is useful to advice about human health.