I breastfeed...and use formula. On most days, Nugget is fed primarily with breastmilk and 1-2 bottles of formula. I'll discuss more about this combination in a later post, but I have to let you know the life-saving "toy" George and I found to help mix our formula, the Baby Breeza Pro Advanced Formula Mixer! Our challenge was that in the middle of the night, we were trying to mix formula in the dark...followed by 5ish minutes of trying to get it warm- bad combination. Then we found this Baby Breeza that both warms and mixes the formula in under 15 seconds. NO, it's not a typo- in just 15 seconds you can have 5+ ounces of formula, warm and ready for your baby. This is a God sent for those middle of the night feedings!