I mean can I take the one from the frigde, pump more then put it back in the fridge @cubanese

so leave the amount I pumped in the fridge pump in another bottle, put them both in the fridge then add them together once both are cooled in one Bottle to feed ? @cubanese

Your body produces different 'kinds' of milk during the day. Like at night there's more melatonin to help the baby sleep and during the day there's more fat to help them stay energized. I'm sure you can put em together as long as it's not like night time pumping mixed into day lol then it's like taking NyQuil and DayQuil at the same time