What is a "sippy cup"?
A "sippy cup" is a training tool that's used to teach your baby the transition from drinking from breast or bottle to regular cups used by adults. "Sippy cups" have a spout that allows the baby to tip it and fill a dropper a little bit at a time. Most "sippy cups" have a valve, or some kind of control mechanism, that will allow the baby to only get a small amount of liquid each time, so that it avoids problems such as choking.