Thinkbaby Stage B Vented Nipples (2 pack)

Unlike the first reviewer, these nipples worked for me. They did fit my 9oz Thinkbaby bottles as good as the ones that originally came with it.One general remark about leaking or not leaking of Thinkbaby bottles: Unlike other bottles you need to tighten them gently. If you screw-tighten them too hard they will leak.Why I just gave 4 stars: I don't like the fact that I had to replace the old nipples. The cross-cut opening was torn after 3-4 months of 3-4 times daily feeding (but then I used 2 bottles, so cut the usage amount in half). This happened to both bottles/nipples (check my image in the gallery).Well, this life cycle might be okay though - what do I know... first child, first bottle system.However, my wife made me order them because she likes the Thinkbaby bottles (basically she doesn't like changes at all while I don't like to argue products with her...). I however like the Philipps Avent (classic) more and I feel like our daughter is drinking better from the Philipps Avent, also they have punctual holes not a cross cut as opening so they might last longer.

These are absolutely spill proof/leak proof nipples! I have tried so many different brands and none have worked as good as these!!! I have to replace the nipples offend just because my daughter now bites the tip of it, and after awhile that will make it start to leak. But it’s well worth it, it saves me from having to clean up a ton of messes! My daughter loves to shake the bottle to try to get the juice out but nothing comes out!. She’s 18 months. She has learned that if she hits her leg with the tip of the nipple a drop of juice will come out, but not by shaking it or tipping it upside down! I highly recommended these!!!!

They tend to collapse

These work really well as far as the baby not having so much air in their stomach and limiting spit up. My only complaint is the formula can get stuck in the little "straw" part and get yucky so you have to be sure to squeeze it and let hot water in through the slit in the straw between each feeding. Not a big deal, just a little tedious.

Bought this to replace the nipples that had worn out. After searching the Internet, thought this was best deal, although had to pay shipping and handling. When they arrived, I realized they are not the same as the originals where the shaft piece looked like they were "cut off" at the ends. Thinking positive, I thought this was the way it was supposed to be. Unfortunately, these nipples leaked from the base constantly making a mess every time our daughter drank from the bottle. The flow is uncontolled. One was worse than the other, and I finally got fed up and threw it away! Beware if you decide to buy from this seller as this was a waste of money. : (

These seem to break really fast. The nipple tip expands. I feel like it could be dangerous for a small baby, a choking issue. We use them for a toddler and they work great for that. But not good for paced feeding.

Love the bottle but the nipples hardly last 2 weeks I have been through 6. 6!!!!!!! They always split open and then my baby is covered in milk.

We are transitioning my 12 month old from a bottle and although this is very similar to the bottle nipples we also ordered the transitional ones. good quality and easy to clean. no leakage from these.