I've seriously been contemplating this. At some point, you have to wonder where your break even point is when you happen to have children, who, like mine, believe that milk is the Nectar of the Gods.
I buy milk 2 gallons at a time... these days, I just cast a cursory glance at the expiration date. As long as it's not labeled with the current days date, I know my kids will have it polished off long before it goes bad.
Buddy will get the biggest glass he can find and fill it up completely to the rim. He does that several times a day.
Sissy enjoys her milk too. Since she can't help herself just yet, I can limit her intake somewhat.
Yesterday, I paid $3.19 a gallon for the WalMart brand./ I remember the days when I would feel thrilled to find it for less than $2 a gallon. That was back when Buddy was smaller.
I'm back to buying whole milk, although I could go back to 2% - which is about the lowest I will go.
Oh well, I was raised on whole milk and that's what the kids prefer, so I will continue to pay a bit more for that.
Frankly, I think 2% is starting to get into "colored water" territory. It just kind of skeeves me out. I don't drink a whole lot of milk just by itself these days. I use it on cereal or while cooking/baking, so I figure MY total calories consumed from milk is minimal. My children are thin (like their mommy used to be), so they can stand to use the extra calories if you ask me.
I suppose it's still cheaper to buy the gallons and gallons of milk at the store. If we had a cow, we'd have to feed it and then find some way to pasteurize the milk after getting it out. I'll stick with the store bought.... I've got enough to do right now.