Hi J.,
First, let me say please don't beat yourself up about this. Twenty-three months is still very young, and the fact that you're looking to help her grow up into a healthy big girl who sleeps through the night tells me you're a good mom who just needs a little guidance. When someone reprimands you for asking for a simple little bit of help here, that's just unnecessary. No one among us is perfect!
You say in your other request that she's allergic to milk, so are you giving her formula (or soymilk, or some other milk sub) or water in the bottle right before bed? If it is formula, she could be waking up at night because she's hungry; you could try feeding her a little more at dinner and/or giving her a small water bottle (or, even better, a big girl cup) before bed. This might be enough to fill her up for the night so she sleeps better. I didn't do bottles much because I always breastfed my boys whenever I could, but when they turned one I just said, "No more!" and started feeding them more before bed instead of nursing them. Miraculously, they both went from waking every two hours to nurse at night to sleeping straight through the night after a day or two. It was heaven!
If you're already giving her water before bedtime, I agree with the moms who say she's waking more out of comfort than need. She probably really likes the "mommy time" and her body has become accustomed to it. I don't agree with giving her a sippy cup of water or putting a bottle of water in her crib if this is the case, because that's just enabling her to keep the unnecessary habit up. She will benefit much more in the long run to routinely sleep through the night without constant access to water, only calling you if she is legitimately thirsty--which in my experience with my four kids, isn't all that often.
I like the mom's advice to "lose" all but one of the bottles, and I have always heard good results with bottles/binks about "sending them to the babies who don't have any." That mom who went the distance to take her toddler to the post office has the right idea! One way or another, if you want her to stop with the bottle you're going to have to take it away--exactly how and when is entirely up to you. Your daughter might be more ready than you think if she's just waking up out of habit for cuddle time; she could cry for a night or two (or three, or seven) and then fall naturally into her new sleep routine.
Good luck--my youngest daughter didn't sleep through the night routinely until she was about seven or so: first for bottles, then night terrors, then bed wetting...they don't tell you in the baby books that sometimes big kids don't sleep through the night either!
--M.