The sippy cup is spill proof, and does what it's supposed to. My daughter doesn't drink much from it (she wants to be a big girl and drink from my cup), so the product just doesn't work for us. The attached handles are great for kids (easy for them to grip and use) but I find them annoying. When I twist on or off the lid, those handles are in the way. And they will pinch your finger if you don't pay attention while screwing it on.