This water bottle is (almost!) perfect. I've been searching for a bottle for my son that doesn't make the water taste like plastic. (Have you ever had a taste at the end of the day?!) Glad to discover tritan, which is also very durable since my 20 month old throws it, drops it, bangs it, etc. This bottle also has a super cute design. I'm docking one star due to the fact that the lower part of the straw is actually plastic, not silicone, and the button is a bit difficult for my son to open on his own.