" Oat milk is a plant milk derived from whole oat grains by extracting the plant material with water. Oat milk has a creamy texture and mild oatmeal-like flavor, and is manufactured in various flavors, such as sweetened, unsweetened, vanilla, and chocolate. Unlike other plant milks having origins as early as the 13th century, oat milk was developed in the 1990s by the Swedish scientist Rickard Öste. Over 2017 to 2019, oat milk sales in the United States increased 10 fold, and one major manufacturer, Oatly, reported a three-fold increase in worldwide sales. As of late 2020, the oat milk market became second-largest among plant milks in the United States, following the leader, almond milk, but exceeding the sales of soy milk." - Wikipedia