I am a college junior and I will be taking about 2-3 weeks off from school after I have DS. So far I have a glider/ottoman, a boppy pillow and the Playtex premium nurser set. I don't know what pump I'll be using (most likely a Medela or Ameda), but I don't know if I should use the bags or the bottles for storage. The pumpmate system is expensive for only 60 liners for $20. I also heard that I can pump directly into the drop-ins and freeze those as well. Can you use a bottle warmer with the nurser system? Thank you for your help!