With my Ameda PY, I got an insulated soft-sided cooler with freezer packs, which holds 6 bottles. They have markings to 4 oz, but I think you can get an extra ounce in if you fill to the top. So, that's a total of 24 to maybe 30 oz. capacity.
The thing is, I have tremendous oversupply, despite block feeding since 2 weeks. I'm worried that my supply will suffer when I return to work at 12 weeks, though (I have a very stressful job that I hate, but financially must return to). So, I was planning to dual pump both breasts even though I currently block feed from only one side per feeding.
(If I get extra, I'll add it to my freezer stash. I currently have 215 oz. in the freezer, which could be pretty quickly depleted if I needed to travel for a week, kwim?)
Back to my question - will 24-30 oz. be sufficient capacity for me to store my day's pumped milk, do you think? Right now, at my fullest in the morning, I pump the side opposite from what I feed and get 3-4 oz. I'm gone 10-12 hours a day. I can do the math and figure that I would be pushing capacity if I pumped 3 oz. per side 4x a day, and over capacity if I pumped 4 oz. per side. But at the same time, I assume my supply will be lower during the work day and I won't have my baby right near me to help with letdown.
I'm just wondering from those who currently pump how much I might expect to be getting and if you think I should plan to have an extra set of bottles and extra cooler (I'd rather not spend the $35 to get another set if I don't need it, kwim?)