This may be what I end up doing. Except I'm going out of town tomorrow, so I don't think I'll have time to get more bottles (since I don't have the babies yet, I've just been using the same two bottles that came with my pump and storing in bags). And that's another panic I have... What to do with my milk while I'm out of town. I hate to pour it out, but I may not have a choice. :(
To solve the storage problem, you might want to try keeping 3 bottles going. Bottle #1 has fresh-pumped, warm milk in it. Bottle #2 has milk that has been sitting in the fridge for a while and is nice and cool. Bottle #3 is your storage bottle. Every time you pump, you put bottle #1 in the fridge, pour the cooled milk from #2 into #3, and then wash #2 and pump into that bottle the next time. #3 never gets warmed up because all the milk that is poured into it has already had a chance to cool.