Why on earth would you do that? She is far too young for juice, let alone caffeinated beverages. She's still a bit young for babyfood, for that matter. It's normally JUST introduced at around 6 months. There is REALLY no rush. At at almost 6 months, all she needs is breastmilk or formula. If you want to introduce a cup, you can put a bit of water in one, but she really doesn't need even that. As for solids, a few bites once or twice a day would be ample.
As for tea -- probably mid-school age might be a reasonable time to introduce it.