Storing Breast Milk

A new study published in the Journal of Pediatrics found that 
breastmilk is safe in the fridge if used within 4 days of pumping.  
This is good news not only for moms who have babies in the hospital 
and are trying to pump enough milk to provide the calories and other 
nutrients, but also for working moms and all moms who can't bear to 
even think about discarding any unused pumped milk.  In a small study 
reported in the Journal of Pediatrics, the lead author, Dr. Schanler 
found very little difference in bacteria counts in milk that was 48 
hours old and milk that was 96 hours old.

There was also a suggestion to use glass bottles or BPA-free plastic 
to store the milk. And, while freezing is ok, there is some loss of 
nutrients when milk has been frozen.  It's not serious enough to say 
don't use frozen milk, but I'd recommend that if you do use frozen 
milk, try to mix in fresh with the frozen to help increase nutrients.