I don’t know if you still buy these disposable water cups at home. I usually use these in restaurants when I take my baby out to eat out, but I basically don't let my children use them. Because these paper cups may contain brightening fluorescent agents, once these fluorescent agents enter the body, they will become potential carcinogens. In addition, some of the paper cups are of poor quality. If you pour hot water, it may leak and scald your child. Therefore, choosing a stainless steel vacuum flask is the best choice.
