We've used this for a solid month and it's not leaked, or cracked. My 17 month old has thrown it, dropped, rolled it down a hill and more. It's incredibly durable and hasn't leaked yet.I'm only taking off one star for the "insulated" claim. We live in Southern California where it's always hot. The water gets warm pretty fast. I haven't noticed any significant "insulation". But the kids don't care about that. What's important is.it doesn't LEAK and hasn't cracked yet.
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