I'm a new mom and I exclusively breastfeed my son and bottle feed him my pumped milk as well; he is almost 3 months old. His latch is better thanks to the bottle and my mother can feed him once I go back to school and work. I bought these bottles called, Latch by Munchkin. They are completely worth every penny! It's a VERY easy transfer from breast to bottle and back, it also gives your sore nipples a break!! It also has an anti-colic valve. Read about it in the link below if you're interested:

 

You can also Google cheaper prices if you like, like Amazon, Target and etc.