I opened these pacifiers because my baby liked another one, but I didn't use them and have been storing them. These are the type that can be used from 0 months old. The one on the left is a 0-month-old pacifier that is designed to prevent buck teeth and glows in the dark. The one on the right is a Pigeon pacifier. It's size M and can be used from 3 months old. Both can be sterilized by boiling. They come with cases.