Ok, so i am due to go back to work soon (my cho...

Ok, so i am due to go back to work soon (my choice) and im still bf which is a little strange for me as i stopped with DS1 when he was 11 weeks (due to complications), so this is all totally new for me and im just wondering as DS2 will be also going to CC once a week, How do i store breast milk so i have enough for CC on the friday?? And do i keep expressing on the friday whilst DS2 is at CC to keep supply up?? Im so confused LOL. Any Advice would be wonderful cheers Shell