"Acid for dripping on rubber" How to use it without risking danger

In the case of parents taking their 4-year-old son to play at a friend’s house who is a rubber plantation worker, while sitting and playing with the neighbors, the son ran around the house and accidentally picked up a bottle of soda containing rubber acid to drink, until he cried and vomited violently, so he had to be taken to the hospital. สล็อต