Since 1918. Ultra-pasteurized. Thank you for choosing Darigold. It's how we measure ourselves. Every scoop, cup, dip, tablespoon and dash. It's farmers owning the company. It's cows loving their farmers. It's rBST free milk. It's the thickest sour cream, the cookingest butter and the best cottage cheese in the world. It's you cooking the most tantalizing, mesmerizing, great tasting food in your life. rBST free (from cows not treated with rBST. According to the FDA, no significant difference has been shown between milk derived from rBST treated and non-rBST treated cows).