Unicum is regarded as one of the national drinks of Hungary. The production facility offers tours which include a tasting session of the multiple different varieties including Unicum and Unicum Plum. According to the manufacturer, the original Unicum is no longer distributed, having been replaced by Unicum Next (a sweeter, thinner-bodied drink with a more prominent citrus flavour), re-branded as "Zwack".
Zwack Liqueur was developed as a more approachable version of the original Zwack Unicum. It tones down the bitterness and increases the citrus notes of the original bitter digestive liqueur to make it more appealing to drinkers outside of Zwack's established domestic Hungarian market.