Is it safe to drink from a chipped mug

Although not proven to be dangerous in finished form, a crack, or scratch along the inside or the lip portion of a plastic mug can emit trace amounts of plastic substances, such as bisphenol a, or even flake off fragments into the liquid, making the mug unsafe to use.Dangers of china glazed ceramic coffee mugs.There's a bit of difference between a trashy plastic cup and big honking glass mug.And yeah, never drink out of a cracked glass, just chuck it out, or use it as a pen holder or something, and hit up your local a&w to see if they sell the mugs.