Baby refusing Bottles

My daughter is 2mo and exclusively breast fed. For the past 3 weeks we have been trying to get her to take a bottle daily but she refuses everything. We tried 5 different bottle brands, different temperatures, frozen vs freshly pumped, walking vs sitting while feeding, mom vs dad feeding.. But nothing works! She can't be tricked for one second and I know she probably prefers breast because of the whole experience that comes with it but.. It worries me because I will be away from her for 8 hours in a week for work and my mom wont be able to feed the poor thing?? Any tricks that worked for your stubborn babies??