My son is eight months old he just got him a sippy cups he’s using a nubby sippy cup but the nipple gets pushed down kind of and you have to pull it up and he doesn’t know how to do that yet also he isn’t getting that much milk from it compared to a bottle I was just wondering if there’s any better sippy cups out there we just started transitioning him to those sippy cups but he used to drink full9 ounce bottles now he only drinks like 3 ounces out of the sippy cup