BPA FreeSpill-Proof Ultra Durable Soft Spout Soft, Bite Proof Spout is Gentle on GumsClick Lock™ Technology Locks Lid in Place with An Audible Click It's The little Things Finally, a bite-proof cup that’s gentle on soft gums, because while a spout should be tough, it doesn’t have to be hard. Our new Click Lock® sippy cups come with a soft, bite-proof spout and a 100% leak-proof guarantee These innovative cups feature a simple locking lid that closes to create a leak-proof seal. You can see, hear and feel the cup lock in place, so you have triple assurance against dribbles and drips. We even back this no-leak promise with a 100% replacement guarantee. Secured, and rest assured - this might just be the sippy cup of your dreams.