I just started expressing for a "just in case of emergency" situations. My baby is 4 months old and exclusively breastfed. I have no issue expressing ~ I can get 5 ounces easily with my Medela electric breast pump. However, I tried to give him a bottle of EBM this afternoon and he's absolutely clueless about how to use it. How have you moms introduced the bottle successfully? Any advice is greatly appreciated. I would love to be able to go out and enjoy a horseback ride every now and then without worrying if baby is going to get hungry while I'm out. Thanks in advance!