Pigeon Mother's Milk Realization Baby Bottle 160ml Left bottle: Glass, Middle: Plastic, Right: Plastic These were not sterilized with Milton. They were steam sterilized after each use, so there is no discoloration of the plastic. The yellow appearance is the original color. The glass bottle is in beautiful condition, but there are some scratches. All were used for about a month. The two plastic bottles were only used for tea. For hygiene reasons, the nipples are not included. No price reduction.