With the Philips AVENT toddler sippers drinking training is easy. The flip-top lid keeps the spout clean at all times, even when on the go. The cup is amazingly spill-proof whether shaken or thrown in the air and yet easy to drink from. Non-spill spout: Patented valve controls flow to avoid spillage, even if held upside down or if left on its side. Soft spout 6 months+: Soft spout for delicate gums. Completely Interchangeable : Cups, spouts and handles can be used with the entire Philips Avent range, attach directly to breast pumps or use a nipple instead of the spout when feeding. The soft spout and handles can also be put on the feeding bottle for an easy transition from bottle to cup.