Wish I went with a different bottle.

Okay, so everyone's child is different. But if your using dr browns bottles, they should be the same.
Up until the point where we could take out the anti-colic green stem, the bottles continued to leak. And that was with following all the directions. We were recommended these bottles, we were so unhappy. Our friends said they never experienced this problem, and came over to see if we were making an error. They tried with same results.
After we stopped using the green stem, they were alright except, the anti colic...was now gone.