It loses a lot of liquid and the nipple is so soft that it goes in as soon as the baby grabs it. It has leaks no matter what I do. Also, all the parts take a long time to wash each time. Unfortunately, it didn't work for us at all.

Very good! Although I had the old model, I had to buy the new one from our neighborhood pharmacy because there were no nipples, etc., nevertheless the baby caught the new bottle and I can happily say! However, I can't understand why they comment that the bottle leaks milk. At first, two drops dripped from the edge of the nipple for me too, I screwed it on better and that was it, not a drop down...

It is very good bottle. I have both the glass and the plastic one and they are exactly the same, none of them ever leaks milk!

Black milk spills everywhere, it's a shame and I wanted it to be good since everyone was saying the best things about it... money wasted

I really want to love these bottles after hearing such good reviews but to me they have been nothing but average. When my baby had acid reflux I did find the vent system helped with his gas but this is probably the only good trait they have.
The bottles leak very very easily so preparing a bottle becomes a bit of a chore, as does cleaning with the vent system it takes longer than cleaning the average bottle and if you don’t clean them effectively they gain mould very easily.
The retention of heat o also find an issue, if my baby is drowsy and taking slightly longer to finish the bottle it is cold by the time he is half way through.

The bottles have incredible leakage, exactly the opposite of glass ones that don't lose a drop of milk. Every time my baby drank from the plastic bottle, he would feel terrible.

Yes, nice bottle I must say... but! I have lost count of how many times the milk has leaked and the baby has gotten soaked... and I'm not even talking about at least 20ml of milk wasted

Glass bottles do not leak. Plastic ones, on the other hand, leak quite a bit.
Glass bottles break, while plastic ones do not and are also much lighter.
I have compromised with plastic because, due to my age, glass is feared to break and my daughter has gotten used to the company's nipple, having started with glass bottles.
The colic system is the same in both series.

Although very satisfied with the glass bottles from the company, unfortunately I can't say the same about the plastic ones. Pure disappointment. The baby drinks milk and a large amount spills on him. I closed the glass bottles for 12 months using the same process, and I do the same with the plastic ones. It's a shame to waste money and go through the hassle of changing the baby's clothes!
Update: After contacting the company, they told me the proper way to prepare the milk so that the bottle doesn't leak. It turned out to be true: we pour the powder into the bottle along with the water, mix well in a circular motion (not like a shaker) with only the collar attached to the nipple and the cap, then we place the green parts and again the nipple and cap, and everything works perfectly.

I bought them because of good reviews. The pink plastic ones we bought are leaking milk. We will try the glass ones to see if they are better.

Lightweight, convenient but simply loses drops when you shake the milk, it is tragically problematic in this area. It doesn't make sense to try to close it with surgical precision. At that time, you want it to apply quickly, tightly and easily because a baby is waiting to eat. Therefore, no, I would not recommend it and I would not buy it again.

5 stars because it is excellent, just like the glass ones. It may lose milk when you put very hot water, but if you cool it down a bit and then add the powder, it's perfect.

I have both the plastic and glass ones for 3 months now! They don't leak a single drop compared to what others are saying above, and I sterilize them at least 3 times a day! There must be something you're not doing right for your bottles to leak milk. It requires attention on how to seal the bottle properly because the round part inside for the straw may not fit well and that's where it could leak!

When you pour the milk to whisk it, it loses a lot of milk. I also have the glass ones in which not even a drop escapes

Because we struggled a bit with colic, I started giving her milk exclusively with these specific bottles, they helped us a lot as they significantly reduced air intake during feeding. I recommend it, it helped us a lot!

I started giving my baby the Dr Brown pacifier to teach him how to suckle and eventually transition to powdered milk. Well, with this particular bottle, I had no issues. He accepted it immediately, initially breastfeeding and then I would give him the bottle. It latched on without any complaints. Whereas with my older child and the Nuk bottle, it took almost a day for him to accept it. One of my best purchases. Easy to clean, large size, and doesn't leak a single drop.

Because I am a new mom, I searched a lot for which products to buy for my baby. Personally, I only bought large bottles and not small ones, as they are only for the first three months and afterwards you need the larger ones anyway. After five months of using these, I can't say that I am satisfied. In the beginning, they didn't lose so much milk. Maybe from the use and sterilizations, they started to lose more. It's not worth it. I make 200 ml of milk and only 150 ml remain for the baby to drink. I was much more satisfied with the Mam company. It's a shame because the nipple they have suits the baby.

I am a user of the older models. Regarding the innovation for the baby to not have colic, it works perfectly. The only drawback is that it almost always leaks milk. It needs to always have a tissue around the bottle's neck

We bought them in case we are out so that we don't carry the glass ones from the same company, but these ones lose a tremendous amount of milk if you put boiling water, and it takes a long time to cool down (like all plastic ones), so we ended up carrying glass ones again and I only use them at home when we are not in a hurry to feed him.
I wouldn't buy them again!