Ideally, babies will be off the bottle by 12 months. It isn't an emergency if they aren't (my pediatrician doesn't get cranky about it until 18 months) but the way the milk (or formula) sits on their teeth is much more likely to cause cavities with a bottle rather than a cup. In fact, the rapid decay of many teeth in a baby's mouth is called "baby bottle mouth" and has life-long consequences (though it is fairly rare.)
If you can get her off the bottles now, do it. My son wasn't ready until about 13 months-- at 12 months he couldn't figure out how to drink from a sippy (even the very soft silicone ones), by 13 months he could drink from anything. I think it is just a development thing. So, if she can drink from the sippys, I'd ditch the bottles because in the next several months she will become much less pliable!
My pediatrician also said that the harder spouted sippy cups are preferable because they are less likely to cause decay. At first my son couldn't work them, so we used the silicone (Nubby) cups, but now we're on mostly hard ones.
At around a year you can start to trust them to regulate their own food. If she's eating lots of cheese and yogurt, she may be wanting less milk/formula. Make sure you are offering water in sippy cups too, especially if she's not taking as much milk.
Good luck!