I used it about twice, but I stopped using it because I switched to exclusive breastfeeding. It has been sterilized, but if you are concerned, please sterilize it again before use. A glass baby bottle with a distinctive flower pattern on the scale. Babies can drink in the same posture as breastfeeding, which is the easiest for them. The Dr. Betta baby bottle is not just angled for its design. The unique curve, devised by a pediatrician, controls the posture during bottle-feeding to be the same as breastfeeding. This natural feeding posture with the head raised prevents milk from flowing into the baby's Eustachian tubes, and makes it easier for babies with weak sucking ability to swallow, producing many effects that make it easier to drink milk. And it prevents illness.