We used Advent bottles/nipples for our first kid and were planning to as well for our full term twins (no medical issues or NICU time, same size/development as a full term singleton). The old nipples no longer exist so we bought these, the closest to what they used to have. Neither of my kids now can use them and we've tried different flows. I tried to get milk/water out of them manually and they DO NOT WORK. My kids can breastfeed fine AND can use the other random bottles we ended up trying we were given and have been buying a different brand now. While I loved these products, they are not beyond useless.

I hate this nipple, I follow the guidelines like the #1 original is #3 on the natural response but my daughter hates it and just getting frustrated from this nipple! I love avent bottles but this "latest innovation" is the worst and waste of money.. why can't you just keep the original designed. This is stupid!!

We have tried these since our newborn was a few days old. He is now 1m and it takes him forever to get the bottle even partially down. Also, the caps are insanely hard to get off. I understand babies need different flow rates, but looking through the reviews this seems to be a consistent problem.

Purchased the natural baby bottles with the natural response nipples. Used the old Level 1 nipple successfully. With the new Level 2 & 4 (with notably slower flow), my baby is unable to get milk out of either one. Have seen reviews & seen this is a constant problem - with the only explanation given that it's supposed to mimic breastfeeding. What viable alternative are you recommending? Was a NICU nurse for 6 years & am a peds NP & have never had this issue with any type of bottle. Looking for a working solution - currently feel like my only options are to play arts & crafts with the current nipples & make the holes bigger or use a different brand. Attempted to contact customer service & was on hold for over an hour.

These new nipples do not work. No milk comes out of them at all. Please bring back the old nipples or offer them for sale.

My daughter loves the original version but this one she cannot get any milk out. I get wanting drip free but it was even hard for me to get anything out. At least have both for sale, I can't find the original which work perfectly anywhere.

Baby can't get any milk out and is ebf. New design is not good. Even as an adult I can't hardly get anything out.

At least half of the size 3 nipples I bought either don't let out any liquid or it takes my 3-month-old baby 15 minutes to drink half an ounce when that would normally be plenty of time to drink several ounces. Extremely unhappy with the redesign.

Barely any flow. The old version of nipples are millions times better.

This new design does not work nor does it feel like the end of a real human nipple, it has a strange new indentation where the nipple hole sits. A terrible new design. I tried 3,4,5 and my baby can't get any milk out, he's only 4 months old and did fine with the old design, but those are discontinued and impossible to find in stores. I loved the old ones, so did my baby! My Avent natural bottles are now useless for us. I am having to go through the headache of switching brands now.