It holds a sufficient amount of water at a steady temperature. The opening for the straw is a bit difficult for small children.

Good, it does its job, but when you press the button to open it, the stick pops out abruptly, causing you to sometimes get water, saliva, and whatever else is on your face. It requires careful opening, in short.

I bought the whole series a year ago for kindergarten and I was very satisfied with everything except for the water bottle. I do not recommend it.
When I received it, it seemed perfect for younger children, but it turned out to be difficult for everyone, including 5-year-olds. They had difficulty drinking from it and definitely couldn't refill it on their own. It's great that all the parts are removable for proper cleaning, but the main drawback is that if it falls sideways, the bottom unscrews and spills everywhere! On the first day of school, it leaked completely and made a mess of the school, so I returned it, considering it to be defective. The same thing happened with the second one, and my teacher asked me not to bring it to school again. We kept it as a backup at home, and after a few months, the protective cap broke. We still have the rest of the set. I recommend the entire mapped series, but not the water bottle

She took it with her to school and it came a few times with a wet bag. Since then, we replaced it. However, it is good that all its parts come out and it can be properly cleaned.