Dekuyper® Sloe Gin. The brand bartenders trust. 40 Proof. 750 ml. DeKuyper Sloe Gin brings you all-natural, bartender-quality flavor so you can mix classic cocktails or create your own signature drinks. DeKuyper is committed to providing you with cordials of the highest quality. We use all-natural flavors, and our products do not contain high fructose corn syrup. Under license from De Kuyper Royal Distillers, Schiedam, The Netherlands. www.dekuyperusa.com.