Rinse away calcium buildup in Keurig K-Cup, 2. 0, Rivo or Vue coffee makers for better tasting beverages. Descaling with this Keurig solution every 3 to 6 months to remove accumulated minerals keeps the brewer in top shape and extends its service life. Fast acting odorless descaling solution will help to extend the life of your brewer. Comes in 14 fl. oz. bottle. Active chemical: citric acid. Removes calcium deposits that can build up inside your brewer. For use with Keurig K-Cup, Vue, and Rivo brewers. Descaling is recommended every three to six months. Keep your brewer in top shape with this Keurig descaling solution.