My son, when he was about six or 8 months, took to a sippy cup right away, and we just cut down on the bottle, I took away the afternoon, before nap one, then the night before bed one, he still takes milk(whole) at night, but from a mug with a straw. He does still have a morning bottle, the only one, when he wakes up in the morning, but that's just to prolong breakfast for an hour or so, so he can eat with us. He will be two on wednesday. Also, weird thing, he would NEVER hold his own bottle, not until he was 18 months or so!! But I blame that on myself, I was never the parent who would prop his bottle on a blanket or pillow, I always held it for him, and he just kinda figured that was mom and dad's job, to hold the bottle for him. But he took the cup immediately, kids are just funny that way!