Holding the Bottle

My baby is 8 months old and she is very intelligent. She can crawl, wave, eat on her own, and a lot more stuff. But she doesn't know how to hold the bottle though. How did you teach your little one how to hold the bottle!? How long did it take before they started doing it on their own!? Thanks in advance:)!!! 
UPDATE: when I meant intelligent I was talking about a fast learner. I just didn't know how to easily describe it. She picks up on things fast but refuses to pick up on holding a bottle. That's all I meant I'm sorry if it come off wrong!