2 Answers

 Pewter measures from the 17th and 18th centuries were made from an alloy of tin with a small percentage of lead to harden the metal. With current understanding of the effect of heavy metals such as lead on the body, it is not advisable to use them for drinking purposes.

Towards the end of the 18th century a new alloy called Britannia metal was discovered which could be used for large scale manufacture of teapots, tankards and the like through its ability to be rolled pressed and worked on wooden formers and cold stamped. Up to then pewter had been cast in expensive moulds. This change in tooling with Britannia metal gave resurgence to the industry and new centres were created in Sheffield and Birmingham.

As Britannia metal is an alloy of tin, antimony and copper there are no restrictions on its use for drinking. All pewter of modern manufacture meets the same standard.

Just a cup and a mug mate,unless you know something i do not..>>>>>>>><<<<<<<<..