I absolutely love these bottles! I used them with both of my girls and never had an issue regarding colic. It has alot of pieces to clean but much easier than cleaning the doctor brown bottles with that straw looking thing.

Such a great bottle to use. Sometimes it gets on my nerves with how to clean them but i like them overall. Both of my kids loved them.

Love, love, love! These bottles are by far the best botles i have ever used. They do kinda suck when you are trying to make a 6 oz or 8 oz bottle depending on bottle size because of the curve, but you get over that. They are super easy to clean and for some reason they are the only bottle my 9 month old can hold on his own