Seeing double eagle heads while drinking
Enamelled imperial eagle tankards or 'reichsadlerhumpen' – large three or four-litre glass drinking vessels enamelled with the 56 coats of arms and the quaternion eagle of the Holy Roman Empire – were popular from the 16th to the late 18th century.
Making them was something of a rite of passage for the glassmakers of Bohemia, Saxony, Thuringia, …