Rejecting milk

Hi mummies, my LO is 7.5 mths and he is rejecting his milk completely but has no issue when i give him pacifier, solid or water in a bottle. He's teethiing and i tried to give cold milk but still he reject it.. He will be crying and push away his bottle when i try to feed him. Gave him gripe water but still it doesnr help How do i get my son to drink his milk? #pleasehelp