Sometimes I love it, sometimes I hate it! I love the weighted straw that follows the liquid. It's perfect for my 15mo and he loves the cup! If I had reviewed it the first day, I would have given it 5starts. But then something started happening. What I hate is that sometimes the cup becomes a "volcano" and the liquid starts coming up, forming a huge puddle around the cup. No idea how/when that happens, but when it does, it just won't stop! I tried closing the lid, but the liquid still comes up. It happened with both water and milk. Maybe my kid was shaking? I don't know. But it's quite annoying.