Of course we all know the days of the milkman delivering milk bottles with delicious cream at the top is part of America's past. Back when this was a daily occurrence homogenization was not done therefore, the cream which had separated from the milk would not stir back into the milk. Homogenization solved that problem. Pasteurization and Homogenization have made milk consumption safe but even though its shelf life has been extended milk is still a very perishable product. Sunlight and warm temperatures cause rapid spoilage and souring of dairy products. So drink up! ~ Chef Wilkinson ~