It does not leak milk and it looks high-quality. To be honest, we bought it because it had a slightly slanted nipple and we thought it might be something a bit more fancy. In the end, the baby did not accept it and this slanted nipple did not work at all, in other words, it was a complete failure.

The first bottle I tried on my son when he was 6 weeks old and he accepted it perfectly. He continues to exclusively breastfeed without any problems at all. Sometimes he chokes because he sucks too hard as he has learned on the breast, but I don't think it's the bottle nipple's fault. It is also made of glass, a material much better than plastic, and its shape suits him more than other bottles from different companies.

Huge hole for 0+ babies, when they eat, too much milk comes out resulting in choking and constant wetness. I would not recommend it for newborns.