This cup has lots of pros, but a few cons. Pros: easy for a baby to use (my son is 14 months), straw seems to be fine even though he has teeth and he's chewing on it once in a while, very few parts so nice to clean (except straw), amazing invention where even if baby holds cup up, the straw bends down and the water will still get sucked up :). Cons: I have no idea how to get the straw off to clean it. It's very thin and bendy and I worry it'll break if I pull it off, so so far I've only been able to clean it by running water through it. Also, it has leaked on a me a couple of times. I'm not sure if that's due to water pressure/heat/cold (which all straw sippies do) or the seal that seems to not even exist... or if I've screwed it too tight.