they worked ok with my kids. they were shaped easy for handling

I used these for my oldest when he was a baby. He had gas issues & these bottles helped quite a bit with his issues. They were a little more expensive but did the job. They were also a bit of a hassle to clean. Overall still a good product.

These bottles were just OK for my son. I did however like the shape of the bottle but it was also very difficult to clean, even with those special bottle cleaners. Especially when you don't have a dishwasher.

I like Playtex but these ones are not the best ones. If it's not tight enough or on there just right it leaks. Have not recommend to anyone

While the concept of these bottles are great, I can say from experience that they aren't very great. It seems cleaning them can be a challenge sometimes as residue can be left in certain spots of the bottle.

Leakage The design makes the bottle easy to hold but the bottle seemed to leak a lot .

1 KID LOVED THEM THE OTHER KID HATES THEM I FIRST USED THESE BOTTLES 13 YEARS AGO WHEN MY SON WAS A BABY. THEY WERE WONDERFUL FOR HIM . HE WAS VERY PICKY WHEN IT CAME TO HIS BOTTLES AND NIPPLES AND THESE WERE BY FAR HIS FAVORITE AND THEY WERE GREAT AT REDUCING GAS. MY DAUGHTER ON THE OTHER HAND WHO IS ALMOST 5 MONTHS OLD DOES NOT CARE FOR THESE BOTTLES AND I THINK ITS BECAUSE THEY FLOW TO FAST FOR HER AND ITS ODD TO ME THAT SHE ISN'T VERY PICKY WHEN IT COMES TO HER BOTTLES AND NIPPLES BUT I CANNOT GET HER TO TAKE THESE ONES AT A LL.

I use the VentAire Advance for my son, I've had the same bottles for over a year now and haven't had many problems. I did have a couple of the "vent rings" at the bottom that leaked, I simply threw those out and used the spares in the kit. My biggest complaint is that the measurement markings on the outside of the bottles have all rubbed off, the original VentAire set I have (not Advanced) still has the markings very clearly.

I love these bottles but they are a little pricey and have a lot of pieces to keep track of. Overall I loved them though.

Love these bottles!! They are great to prevent gas and upset stomachs!! The only draw back was cleaning them, as a new mom it is hard taking them completely apart and clean everything, esp if you have more than one child =)

If you dont put the bottom part on correctly they will leak. I found this out right away. But other then that these bottles are great!

Great bottles. Just make sure you get the bottoms on right or they will leak. No fussy babies due to gas over here.

My son is 6 months old and these are the only bottles we have been able to use. I love them. They can be a hassle to clean but the lack of stomach upset and gas make the cleaning worth it. He use to spit up a lot with other bottles we tried and by using these bottles he dosen't spit up anymore after feedings.

I used these with my babies, especially good for colicky babies and babies that swallow a lot of air. Less spit up too. Happy Babies=Happy mommy!

I use these and the drop ins and I don't know if its coinsidence or what but when my child was breastfeeding she had alot of gas, when I switched to formula, I was expecting more gas, since its milk based and it was from a bottle (which everyone knows babys suck in a lot of air). Her gas resolved when I started using these bottle, no more gas drops! I haven't used any other bottle, but I don't think I want try either. Only issue, sometimes leaks at top, but nothing major.