A mazer is a special type of wooden drinking vessel, a wide cup or shallow bowl without handles, with a broad flat foot and a knob or boss in the centre of the inside, known technically as the "print" or "boss". Mazers vary from simple pieces all in wood to those ornamented with metalwork, often in silver or silver-gilt. They use dense impervious woods such as maple ("mazer" is an obsolete name for the maple tree), beech and walnut.[3] They represent a north European medieval tradition, and mostly date from the 11th (or earlier) to the 16th centuries.[4]