Replicas of historical goblets are made by medieval technology. This is a handicraft production. The bubbles and slight inequalities that have been added to today's glass and goblets of forest glass are the magic of ancient times. For replicas of medieval goblets there are typical traces on the bottoms of the cups, which were separated from the whistles and various types of decorations - raspberries, chipped stickers, drawn drops, etc. These decors were not just a decorative element but they also met the practical meaning. They drank mostly with their hands, and the variegated surface of the goblets guaranteed that the wine glass did not slip from them. In Czech glassmaking, the production of forest glass was renowned in the 14th and 15th centuries and was commonly produced until the beginning of the 18th century.