"Leon" wrote in message news:hwmJc.2345

compared to 10 days. 21 to 30 days seems right. Some special milks do
last
a long time. I was wondering if the $4+ per gallon is a result of milk
that
lasts longer.

I've switched brands of milk in the past because the newer brand didn't go
sour as fast. The company explanation was that it was packaged differently
allowing less light to be absorbed by the milk.