Which formula are you using? Can you get it in concentrate? In Canada, all of our major brands (GoodStart, Enfamil, Similac etc) are all available in concentrate and you just add equal parts water...
So, I bought a small 1.5L Starfrit juice jug (it's got a silicone seal to keep odours from mixing in the fridge) and would boil water to make enough formula to last a day or two (depending on what her consumption was at the time - we started with a single box of concentrate - makes 24 ozs). Store the jug in the fridge and just pour a bottle as you need it... I had a bottle warmer too
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Worth every penny.
If you are using powder, you can do the same thing... prep the bottles using water that has been boiled a cooled down to about 70F (this is the temp recommended by most formula companies)... make the bottles, shake em up and put in the fridge right away... warm as needed - and reshake
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Some powder formulas will separate all weird when you do this, just shake when warm
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