Tons of people buy it, and tons of people drink it, which means the recent price drop of milk is a good thing for shoppers.
Part of why it's dropped is the supply of milk continues to go up, but the demand isn't.
"Last year we actually had a six percent increase in milk production," explains Ken Nobis, a dairy farmer and president of the Michigan Milk Producers Association. "A normal increase is more in the neighborhood of two and a half percent."
That's just in Michigan, but Nobis says every state has been increasing production, and internationally European countries have been too.
But that doesn't mean more people are drinking milk.
"The population is growing, but not fast enough to absorb the speed at which milk is increasing," states Nobis.
That means trouble for dairy farmers.
Some are still profiting, but others are dropping. But those prices should increase again according to Nobis.
"It will cycle back again, actually the future still looks good."
He says that's because as people move into the middle class, they choose to diet better, which means more milk and proteins. But that change could still be years away.
Other dairies aren't dropping because the demand is still increasing. There are still more people who aren't buying cheese and yogurt and other products.