Hi N. -
First of all, Pedialyte is DISGUSTING. Have you ever tasted it yourself? I don't blame him for having an aversion to juice, water, something other than formula that he associates with the pedialyte experience - really, it's like colored salt water, and tastes horrible. Many children will not drink it, and my pediatrician always recommends Gatorade over pedialyte: yes, there is extra sugar in it, but when they are sick and you are trying to keep them hydrated, that little bit of extra sugar isn't harmful (as long as you are still brushing their teeth!).
That having been said, now is a really good time to introduce a sippy cup. Behaviorally, it will be MUCH easier to wean him from the bottle when the time comes, and he has/is developing the motor skills in which to use one at about this age. When my daughter was this age, we used the avent cup with the big handles and soft sipee spout (it is pliable, and feels/tastes more like a bottle nipple while not having the nipple shape) and she took right to it. Offer him water or juice in the sippy cup during meals of solid food, in between mealtime and bottles; have one around, ready to go, with juice or water (and if it's juice, you should be partially watering it down; like 2/3 juice, 1/3 water) at all times and with you wherever you go. He is still quite young, and just exposing him to it and offering it to him often will "train" him to use one: don't stress. He's still a baby, and he really DOESN"T need to be drinking juice or water for health at this point as long as he is still drinking his formula regularly and eating foods with a good water content to them.
On the food front, what he should and CAN eat at this age has a lot to do with how many teeth he has. The more teeth, the more textural variety you can give him. At 9 months, my child already had 9/10 teeth so she was eating mostly small, soft table food and stage 3 baby foods. Just think small, soft pieces that - if swallowed whole - will not compromise the airway. At this age, your child does not master the "grinding" motion of chewing as us adults experience, and wont until he is about 4! Soft (overcooked, even) pasta, tiny pieces of steamed veggies, very ripe fruits (you can steam them if the are a sort of fruit that is ripe but not soft) - run out and buy the book "Super Baby Food" - it is an INVALUABLE resource for feeding your baby!