Every parent learns that small kids need lots of cups that are safe from spills. Keeping track of them is another story. With SipSnaps, you can use any tumbler and stretch one over the top of it. Then you’ve got a spill-proof cup to hand on over. SipSnap TOT has a durable, chew-resistant spout for little ones to drink from, while SipSnap KID fits all sizes of cups and straws. The straw hole is flexible, to accommodate straws of different varieties.