A.W.
When I started giving my son a sippy cup i would hold it for him while he drank. That let him know right away what it was for and soon after that he started wanting to try it himself. He now drinks solely from a sippy cup, even to drink his milk before bed! I agree with some of the other moms though, seven months might be too early and letting your daughter play with the cup only reinforces the idea of it being a toy.