Description - 4 counts of Stage 2 straw-nipples(12m+) for any Grosmimi cups and bottles.(No tubes, no kits are included). - Flow of Stage 1 and Stage 2 is the same, but the hardness of silicone is different. Need to change to stage 2 when babies chew a lot with their teeth. - The straw is made of same material with baby nipples. Babies will get used to straw without any rejection. - “+” cut prevents any leaking, the straw can be cut into appropriate length according to the height of the cup during use. - Straw teat is made up of platinum silicone which is a very hygienic and safe, BPA-free material. - Silicone straws are also compatible with other selected brands wide neck bottles.