Mommies, how do you extract the nipple? She said she doesn't take the …

Mommies, how do you extract the nipple? She said she doesn't take the sippy cup ? Turns out everything is in the nipple, looks like a normal nipple. But today I just bought nipple covers, just to try and it happened miracle the baby without crying sucks?? happiness knows no bounds ??? lying next to me happy? How to extract? Are there any attachments?