This is a great product and company. I really like the design, it's easy to clean - all in the dishwasher. I like that it's stainless steel instead of plastic like so many other cups. It keeps my kids milk cold so I don't waste so much. I took off 1 star because it will leak a tiny bit if the lid is open and it's knocked over but let's be honest, I've never found a completely leak proof kids cup or bottle.