My LO just started sitting up at about 21/22 weeks. My hubby has been trying to train her to hold her bottle from the get to (much to my annoyance at times), but to his credit, she can Kind of do it!
Alice is almost 6 months old and she's gotten a lot better at sitting up unassisted, but she still doesn't really hold her bottle by herself, I think it's cuz I still breastfeed her and she doesn't have to hold the boob, so she doesn't really get that she can hold the bottle herself either lol.
My son is 5 months today. He sits up unassisted, but he is still a little wobbly at times. He only holds his bottle when he wants to. I have been making him do it more, so he will get the hang of it.
Re: Sitting up and holding their bottles