Baby dish is toxic because some merchants will soak in a small amount of formaldehyde at the root of baby dish in order to ensure its freshness and non-decay in the bumpy process. Formalin is popular, but the formaldehyde content is very small, which will not cause much impact on human body at first after being eaten by human body, but it can't be eaten for a long time, and the formaldehyde content will accumulate in body form, causing poisoning, so most of the baby dishes are toxic because of formaldehyde soaking.