Fast Breast milk storage bags/ bottle warmers?

Dayna👣

I have this breast pump coming to me free through my insurance but I wanted to know what is a good warmer to use? Do I just warm the storage bag and pour into bottle then give to my baby? How does that work? Also do I have to use this pumps bottle brand or can I use a different brand? If so, do you have a suggestion on the best bottles I should use? Sorry so many questions I just want to do whats best. Please HELP!