Fresh energy that tastes good! The sugarfree Kirstein's Dr. Block Power candies combine fresh cola & herbal taste with the 3-fold power of caffeine, guarana and taurine. The ideal candy on the go, in a practical zip bag. The traditional Austrian brand Kirstein has been experiencing a revival since 2017. Together with the grandson of the company's founder, Willy Kirstein, Edel develops nostalgic candies based on the old recipes, as well as new innovative sweets, such as the sugarfree Dr. Block Energy Candies.