What is a Keurig? Keurig is a beverage brewing system for home and commercial use. Keurig beverage varieties include hot and cold coffees, teas, cocoas, dairy-based beverages, lemonades, cider, and fruit-based drinks. Keurig has over 400 different varieties and over 60 brands of coffee and other … [Read more...] about Keurig Says Add Water But It Is Full. What To Do?