My kiddo has a pretty severe dairy allergy so we had to use this formula called PurAmino. Certainly possible that the formula was to blame, maybe it's more prone to clumping or some such. It definitely helped for those middle of the night feedings where a bottle seemed a lot more complicated than usual haha

It was handy at first but I felt like it didn't always put a consistent amount of formula in the bottle. Plus cleaning it was kind of a pain