Accurate Ounces

So as I move my milk into bags my pumps say 5 ounces but my milk bags say less. I’ve used three different brands and they never match. Anyone else or just me? I’m so confused

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The bags are very inaccurate. I would write the ounce that you get in your milk bottles

Bags are very inaccurate. I use a bottle to measure before hand or a kitchen scale

Heyyyy welcome to the Momcozy community!:heart: I ran into the same problem. I just go by what the pump cups say. The bags seem to be inaccurate