My brother is 5 1/2 years old and he still uses a sippy cup. Usually during the day he'll use a plastic cup and straw, but as soon as my mom gets home he asks her for chocolate milk in a sippy. He ALWAYS takes one to bed at home, but never at our grandparents' house, because he says he doesn't need it there. I've talked to my mom about it because it bothers me that he still uses one and will be going into senior kindergarten when school starts. But she just says that it's his one babyish thing and that he'll stop when he's ready.
But he IS ready, I think my mom isn't ready for him to grow up because he's her last baby (youngest of 5). What should I do?
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