回复：奶瓶喝会残留在牙龈缘。奶瓶型龋齿都是沿着牙龈坏的。

Did you use bottle lately? I use it sometimes when my baby can’t finish the milk. I think using bottle I can swallow the milk directly through my tongue and less touching with teeth, especially when heads up. But using cup, the milk will go through your teeth. Try it yourself. Bottle nipple goes deep into the mouth. That’s why baby doesn’t bite mama’s nipple when breast feeding.