It maintains temperatures very well and that's the only good thing it has. The closure broke, from opening and closing it, in 2 weeks. Also, the straw got cut at the point where it bends from its construction.

After 3 days, the lid broke without it falling down, it just broke from opening and closing! And now it's useless, also it is very bulky and big for such a small water capacity of 350 ml.

With almost daily use, all the plastic parts broke within the first month. First, the safety for the lid broke and then the button that opens it. Unfortunately, the plastic pieces are not at all durable.

Very nice, user-friendly, and sturdy cord to hold the child! Update: After about 3-4 falls (normal for a 2-year-old), the closure broke and never closed again. It leaks a lot when it's not closed. Also, after about 2 months, it rusted internally where the lid screws on, so it's a waste. What a shame.