Pigeon Baby Bottle (Glass, 100ml) Mother's Milk Realization Nipple for General Newborns (SS size) Set of 2 bottles and 2 nipples. Used only for 5 days during a hospital stay in July 2025. The glass bottles were helpful because they cooled quickly. The bottles and nipples were sterilized with Milton. They will be washed and sterilized again before shipping. In the 5th image, it's difficult to see, but there is a white line-like mark on the bottom. There is no problem with using it. I have confirmed with the manufacturer that it is not a crack by sending them a photo.