I bought these bottles for my son. The price was reasonable. I bought them as a set. I found the curve in the bottle used to block air because a hassle to
Clean. Milk would hide in the bend. The nipples would leak.. And the worst part.. The blue lining part in the bottom of the bottle eventually over time lost its size and didn't fit on the bottom of the bottle. These bottles leaked big time!

These drive me crazy! Try getting the multi piece bottle ready as fast as possible while your baby is screaming. Way too difficult. They also leak like crazy a large portion of the time. My most hated bottles.

My son wasn't fussy so I can't say whether these really help prevent gas and such, but I will say that there are several parts to these bottles so they take a long time to wash, and their shape is kind of confusing- family and friends who were unfamiliar with these bottles often held the wrong way. Although they're reasonably priced, I wouldn't really recommend them unless you want to spend an extra ten minutes washing every little piece thoroughly.

I hate these bottles. I think they are awkward to hold and the baby can't hold it them selves, The bottom screws off and if your not careful, all the milk will pour out the bottom.

I honestly found NO difference between these and my regular Playtex bottles, except for the price. These were more expensive, and I could only find them in a 4pack in stores around me. Needless to say, I had 3 unused bottles in my cupboard, as I went back to my regular choice bottle right away.