Hi, my 20 month old son wants a bottle about 5 ...

Hi, my 20 month old son wants a bottle about 5 times a day. If I don't give it to him he cries and cries so eventually I give in. He refuses to drink milk from a cup so I'm wondering if he really wants the milk or if the bottle is more of a comfort, as he hasn"t had a dummy since 12 months. Any suggestions would be appreciated .Thanks