To calculate the overall star rating and percentage breakdown by star, we do not 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 got these bottles with hopes of reducing the gassiness in my baby during feeding after a friend's recommendation. I really wanted to like them but they are so leaky!! They don't leak after you fill and tilt them, but once baby starts feeding, milk would start dripping out making a mess.. I even made sure I don't fill the bottle beyond the blue line and tightened the cap! It's really disappointing!