Listening to your situation was like reading about my own story of introducing the bottle to my daughter. She is one year old now, but when she was a couple of months I tried to offer her a bottle (for the same reason you did, just in case I wasn't around to feed her one day). She was FURIOUS!!! She screamed and cried if anything but SKIN touched her lips!!! She also wouldn't take a pacifier for the same reason. I tried everything from having Daddy feed her to trying to bottle feed her when she wasn't too hungry. I tried all the different nipples and all the different bottles. Nothing worked. I know this response to your question may not seem like it will help you, but I am here to offer some support. Although my daughter never took a bottle, and I was EXHAUSTED by the time she was six months and starting eating something OTHER than breastmilk, after that...it was smoooooth sailin'! So don't stress about it. Even if she doesn't ever take a bottle, once she starts eating baby cereal you will be able to get some time to yourself. You will be able to go to the grocery store ALONE and guilt free! Also, just remember (and my DOCTOR told me this), even if you need to go to the store or run an errand and are away from your daughter for more than 3 or 4 hours, I promise you, she will not starve. She will be just fine. Ask your doctor about it if you are unsure, but I assure you that taking a few hours to yourself every once in a while will do her no harm.
Also, I have a question for you...how does she sleep at night? I may not have any great suggestions for your original request, but I have a GREAT remedy for sleepless nights!!! Let me know!