These bottles are really great, they have ones with two different types of nipples. The perfe-latch is for breastfed babies which is the one that I purchased. They also have an easy-latch nipple for babies with colic. This bottle is great because when feeding your baby you don't have to worry about your baby swallowing any air and becoming gassy. My baby is exclusively breastfed, but I went back to work part-time and my baby has to take a bottle once a day while I work. She takes to the bottle better than she has with other baby bottle brands. These bottles also come in a 4oz and 8oz size which is great for growing babies!

I feel like bittylab bare bottles are great for exclusively breastfed or bottle-fed babies. For exclusively breastfed babies the perfe-latch nipples are as close to a momma as possible while the easy-latch nipples are best for bottle-fed or for babies who are both bottle-fed and breast-fed in alternations. The perfe-latch nipples the baby actually latches on the same way as latching onto the breast. With this technology you actually can feed your baby in the same position as if you were breastfeeding or basically in a sitting position. [product:bittylab-bare-air-free-starter-set-baby-bottle-with-perfe-latch-nipple]. My grandchildren were never gassy or suffered from colic after switching to this brand.

My wife is a first time breastfeeding mom dealing with inadequate milk supply. Our pediatrician said our baby is underweight and malnourished so we need to supplement with formula until her milk increases. We tried all the leading baby bottles but they made our baby super gassy. A friend recommended Bare and the difference is amazing. He can drink upright like our lactation consultant recommends and latches onto the nipple like he does on my wife's breast. Since we started using Bare his gas and reflux went away. My wife continues breastfeeding while using Bare for the milk she pumped. We follow the manufacturer's assembly instructions and never had an issue with leakage or spilled milk. I hightly recommend this product!