Introducing the OH Cup! Like magic, it can be sipped from any side and no spills. "Oh", you say. "But how", you wonder? Silicone performs wonders! This all silicone 12oz cup is 100% platinum,European grade silicone with an embedded stainless steel ring. It won't collapse when gripped It won’t collapse when gripped, while the OH top inserts for a tight fit preventing spills and providing the perfect solution on-the-go and the alternative to a sippy cup. All parts are dishwasher and microwave safe.