I used the Calma bottles with my baby since he was about 6 weeks old. I liked that the nipple replicates breast feeding so it can help with a smoother transition between breast and bottle. My baby drank very well from it until about 5 months old. He lost patience with the flow and would spill a lot of milk. It says it can be used from newborn onwards, but my baby lost interest in it. They are a little pricey (about $20 for one nipple) but I think the quality is really good. I'd recommend this to someone with a newborn who is breastfeeding and bottle feeding.

i use it when my boy was few months old , it was perfect i like it and he did too , i hate that it has many parts to clean

I used these bottle until my son was 4 months & he enjoyed them. I like the function of having to actually suck the milk out. Not too happy that the nipple had so many parts that have to be cleaned out.

This bottle is wonderful. If your breastfeeding your baby and have to give them a bottle this is the way to go. It took a bit for the baby to get used to and the design does take a bit of time to put the nipples together but once you've got it its great. The way the nipple works allows a small stream of milk to be released making the baby make the correct sucking motion to get the milk. Its not a passive feeding experience where the baby just guzzles the milk as it comes out. It tries to mimic the human breast as much as it can and eases the transition from breast to bottle.