Re: Juice - when and what?
I think juice in a sippy can be introduced at 6 months. But there's really no reason why you would have to do so- juice is very sugary and it's generally better to give your child the whole fruit or veggie instead just the juice, because the whole fruit/veg has fiber and juice doesn't. If you're going to do juice, you probably want to water it down to at least 1/2 and 1/2, just to cut the sugar content.
Starting with a juice made from a solid your baby has already tried and had no reaction to sounds like an excellent idea.
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"