The Upright Bottle Bittylab Bare Air-Free 4oz Single for breastmilk or Baby Formula, Anti-Reflux, Anti-Colic, Anti-Gas, Fuss or Sleep Troubles. with Easy-Latch & Perfe-Latch Nipples. 0-6 Months.

This bottle is the best bottle i ever used, my son would not take any bottle till i tried this one. When used correctly, there is no air, no mess and the flow matches the baby. Love love love this bottle. I won't use any other. Follow the instructions. You'll be glad you did.

Use of bottle is easy cleaning is also easy but the whole reason I bought this bottle is because not only does it cover the gas reducing side but also claimed to be easy to transition or switch baby from breast to bottle since the suction power of natural latch nipple was slow flow and milk is only activated by baby sucking which is what I was having issues finding in a bottle so much so that my baby was throwing a fit when I would breast feed because he was mad that he had to work for the milk so this bare bottle sounded like answer to my bottle&breast feeding problems!! I was super excited and had high Hopes for the nipple but sad (very sad) and disappointed to say it did NOT WORK the way they promised. It was still a heavy/fast flow and choked my baby and sucks because he wouldnt latch to the breast type nipple so that sucked too. But mail thing was nipple still flowed too fast and he didnt have to work for it like description promised (yes I watched video and did tmwhat their specific instructions said to do and it still didnt work) amazon luckily opened claim for me and refunded me and I sent item bac. So I will only recommend this bottle if your baby DOES NOT need a SLOW FLOW working nipple. If just looking for a anit gas/colic bottle than this is your bottle!! It works great for that but if you're looking for a NATURAL SLOW FLOW NIPPLE THAT BABY HAS TO WORK FOR SO THAT HE/SHE DOESNT CHOKE Than I do not recommend this bottle for that (the best one I found so far that has the slowest flow nipple I can find so far and that has the anti gas colic feature to is the KIIND kiind bottles look on amazon they're cheaper price too than the over priced bottles that claim same thing... they're awesome they've been doing the trick for our little guy for sure!!

My baby is breastfed and doesn't take any bottles. I purchased this one thinking he would take it but he just chews on it. I like that he can sit up and still get milk even if he isn't "drinking" it he is still getting a little bit and not a bunch of air. Great product for the price. If my baby took a bottle I would buy more.

So, here I was, facing the uphill battle of not only trying to feed a baby with reflux, but a baby that had developed a extreme aversion to breastfeeding and a moderate aversion to bottle feeding. Sadly, I had to give up breastfeeding because my daughter's aversion had become too strong after experiencing the pain and discomfort of reflux before it was diagnosed. Not to mention the PTSD I had developed from endless feeding sessions where we were both in tears by the end. So, we had to go with bottle feeding. However, I was noticing not so much spitting up, but a lot of fussiness, crankiness a few sips into a bottle, and just an overall tension whenever it was time to feed. That made ME anxious. So, feeding time became a really unpleasant experience for both of us. That's when I noticed a few times, whenever the air vent on the bottle was being wonky and air wasn't being returned into the bottle, my baby would suck the formula down. Even if i had to dislodge her once in a while to uncrush the nipple. So, i did some research and found these bottles. I read mixed reviews, so was skeptical but was willing to try anything to make our feeding time more pleasant and quicker. (We've had feeding sessions last anywhere from 10 to 50 minutes...doing that multiple times a day was starting to get old.) Well, I'm happy to report that as of now (i'm only two bottles in), feedings have been going shocking smooth and quick. She was hyper-focused and guzzled down her bottle in minutes. And she had a tiny burp afterwards. No fussiness. No crankiness a few sips in. I imagine as we continue using these, our feeding time together will become a lot less stressful. Even pleasant! I'm leaving off one star for two reasons: 1) Because of the design, you will inevitably get a good amount of formula/breastmilk left at the top. Once it's there and the silicone plug can no longer move any higher up, you'll either have to dump the excess or tip your baby more horizontally so they can finish. (I didn't find it THAT difficult because my baby doesn't have severe reflux and is on medication, so tipping her back and tipping the bottle downward wasn't that difficult, but it was slightly annoying.) 2) When I received my items, the sheet inside informed me that the items were non-returnable. I bought six bottles and 3 packs of nipples because i was panicking and wanted very badly for the bottles to work and for my baby to be able to eat properly. Had it explicitly said there were no returns allowed, I would have been more cautious. Luckily, the bottles are working. BUT i accidentally bought the wrong replacement nipples (i need the easy-latch ones. NOT the perfe-latch ones.) I emailed them to ask if I could return them or exchange them for two 8oz bottles and i would pay the difference. No word from them yet, but it would be REALLY lame if they wouldn't let me do that. EDIT: They have AMAZING, friendly and prompt customer service! I was able to get replacements for the nipples i incorrectly ordered and exchange smaller 4oz bottles I had bought for 8oz bottles now that it seems like my baby is willing to drink more with these bottles! Hurray! I'm keeping it to four stars however because I keep having issues with the air plugs not moving smoothly enough and the added effort is annoying my baby a little bit. My assembly looks solid. No leaks and have followed exactly to a T assembly like their 3 minute video. I've also coated the plug and bottle cylinder with formula to lubricate the plug, but it's still not moving smoothly on a consistent basis. :(

I wanted this to be a helpful too because I was trying to relatch after exclusive pumping due to my son latching way to hard in the hospital and severely bruising and cracking my nipples. I figured the breast feeding nipple would help since my nipples tend to start short and it's hard for him to get started because my nipple isn't like a bottles nipple. He could barely latch to this as well and milk got everywhere is him trying and it just wasn't the bottle for me. Especially at this price.

This was the first bottle I could get my baby to take! She gagged with all other bottles we tried. I LOVE that air (for the most part) isn't in the bottle and that anyone can feed my baby with little to no worry she is gulping air. It is very finicky and must be assembled precisely. I also don't like that it recommends replacing parts so often.

My daughter hasn’t been able to breastfeed since birth, just had tongue a lip tie fixed a week ago and she still can’t breast feed and was having a hard time learning to suck again . How’s this bottle has definitely improved her suck by far. We had tro try the easy latch nipple but will try the other that’s more like a breast nipple and see how that goes and will update. Also I have a very gassy baby and the no air in the bottle is amazing!

Leaked, didn't keep air out like it said, was a struggle to use. Mom don't have time to try research on how to make the bottle work. It should be simple and easy and work like it say.