BeerTender compatible. Sympress draught quality pressure system. Dual Usage System: DaughtKeg; BeerTender compatible. The Heineken DraughtKeg can be used stand-alone with enclosed mini-tap or in your BeerTender after clicking on a separate tube. See leaflet for detailed instructions. Sympress is the technology at the heart of DraughtKeg, used exclusively by Heineken. Sympress ensures that the beer remains sufficiently pressurized and stays fresh for 30 days, enabling you to tap the perfect draught beer with the correct amount of foam and a genuine fresh, smooth taste-anywhere at any time. Quality guaranteed 30 days after opening.