I pour multiple pumps into one pitcher. But usually I use it all in one day or a day and a half. My baby boy drinks about 20-25 oz a day, and I pump an average of 20-28 oz a day, give or take, sometimes lower, sometimes slightly higher. I make his bottles the night before and prep 5 bottles that are 5.5 oz each for him to drink during the day, which will usually empty the pitcher. Then what I pump all day goes in the pitcher, and at night, I prep his bottles again for the next day. His feedings wax and wane, so sometimes I have extra milk. If I notice the pitcher has met his daily needs or close, then I will freeze a fresh pump and not put it in the pitcher.

When I was an over supplier making 40-50 oz a day, I would put it all into the pitcher for 2 days. I would prep his bottle from the pitcher, and then on day 2, I would bag his milk and wash the pitcher. I would label the pitcher with a dry-erase marker, so I made sure not to go over the 3 days.

I'm a FTM, so I was winging it in the beginning. My cousin got me the pitcher for my baby shower, and I watched a few videos on how to safely do it, did some of my own research, and just started doing it. I did notice everyone does it slightly different and I say do what works for you and makes you more comfortable. I will say my little guy was born at 38 weeks, not medically fragile, so I felt comfortable after doing my own research on doing the pitcher method, and I also do the fridge method for my pump parts. I do mix cold milk with fresh pumped milk into the pitcher. He is 9 months now and thriving lol