To ask someone to drink milk in Engpsh, you can say "Would you pke to have a glass of milk?" or "Can I offer you a glass of milk?" or "Would you pke some milk?" or "Can I get you a glass of milk?" These are all popte ways to make the request. You can also simply say "Drink some milk" or "Have a glass of milk" if you are feepng more casual or if you are speaking to someone you are close with.