This set includes 12 bottles: 10 glass and 2 plastic. It also includes 2 sets of nipples in 2 different types. ◯ Two bottles of the Otokeya style have been opened, but I don't think they were used. ◯ Pigeon Mother's Milk Real Feeling - 3 bottles of 100ml, 2 bottles of 200ml. 2 general-purpose nipples (new and unused) ◯ Pigeon - 1 glass bottle of 160ml, 2 plastic bottles of 160ml, 2 glass bottles of 240ml. 2 SS nipples (new and unused) They were sterilized in a microwave.