I agree, milk should be stored in a separate, CLOSED container and pump
parts washed each time.  Breastmilk has a surprising amount of fat that
makes pump parts sticky. (breast funnel and bottle.)  I don't think that
pumping into chilled milk is a good idea.  I have always told moms to chill
additional milk before adding it to stored chilled or frozen milk.  I would
think  she can use 2 bottles, one for collected milk and one to pump into.
Chill that new bit until next pumping and add it to storage bottle.  Rinse
pumping bottle and pump again.  Just simple cleanliness and common sense, I
guess.  Sincerely, Pat in SNJ

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