Sorry, that sounds totally bizarre. In fact, it makes me sound like a breastmilk fairy who gathers it from under toadstools .
So let me explain..
I express in the morning + freeze it in a bag. But I also collect leaking milk from my udder breasts in shells. In the shells, I don't get a load - 40ml max - and it's a bit of a waste of a bag to freeze such small amounts.
So, can I put my 40mls in a bottle in the fridge, then add the next 40mls etc to get a decent amount through the day, and then freeze it?
I've heard something about mixing chilled milk and body temp milk. Something like...don't do it!