over the late middle ages there is a movement from deep bowls with narrow rims to shallower bowls and much wider rims. in the 13th and 14th century rims tend to be simple and plain, only about 1 cm deep without lettering, 15th and 16th century rims are very characteristic with a very deep (3–4 cm moulded form) often with lettering. one exception to this rule is the mazer which samuel pepys drank from in 1660 (on display in the british museum), the rim of this mazer is hallmarked 1507/8 but it is of the earlier simple form. a good display is at the museum of canterbury, where ten 13th and 14th century mazers are shown.