Ok so Im a first time mom and ive heard a lot about bottle rot. DD hates brushing her teeth so I worry a lot. I still brush her teeth but i have to hold her to do it. Anyway, why is it that ppl say bottles cause teeth rot but sippy cups dont? I thought the rot came from the milk sitting on her teeth? I prob sound like a complete airhead and sorry but im honestly confused. Hopefully i dont get flamed!