For babies who are teething, this 6 oz/180 ml hard spout cup is perfect. It has a sip-activated valve, so when the baby isn't drinking, there won't be any mess because it can only be opened with their mouth. All parts in Dr Brown's Trainer Cup System are interchangeable - handle, spout and valve. Detachable handles accompanied by a protective lid Dishwasher safe; only use the top rack; pink