DS was lazy and didnt officially hold his until it was time to take them away! And by lazy I mean spoiled. DD holds onto her bottle when I give it to her now, but can not hold it by herself yet.
DD can hold hers, but not for long. We use 4 oz ones and they are light enough for her support, but like PP said, often she needs help because if it starts to droop she can't tip it back up to get a good flow on her own. I'm guessing 6 months?
Re: trying to remember