To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyses reviews to verify trustworthiness.
I actually hate this bottle. It leaks, it's annoying to clean, and it is poor quality. I emailed the company regarding the leaking, and they didn't seem to care. Too bad, so sad. I bought the thermoflask bottles for my toddler from Costco instead - the quality is 100 times better and it doesn't leak Waste of money.