expired milk

i probably tried to store up milk a bit too early... the freezer is full again and today we threw away our second (or was it the third?) batch of nearly expired milk which were expressed about two months ago. we didn't bear to count how many were there, maybe about 15 bags of 7 - 10 oz?

is there any better use of expired breastmilk? someone on the web suggested having a milk spa, and someone made muffins with them. now that i'm going back to work, i hope i will still have the luxury to have extra milk to be throwing away.