My LO is almost a year and I'm not transitioning away from bottles yet so you're ahead of me. He still gets a bedtime bottle but I make sure to brush his teeth afterwards. He loves water from a sippy cup and does just fine, even drinking from a straw just haven't put formula in it yet.
Right now he gets 4 bottles a day but I guess we are lucky because he doesn't need a bottle before a nap. In fact, the way timing works out, he usually has a bottle AFTER he wakes up from a nap. Hopefully our pedi has some suggestions about the transition at his 1 year appt in a couple weeks. I'm no help to you... :(