noun / adjective
pewter
PYOO-ter/ˈpjuːtər/
A dull gray alloy consisting mainly of tin.
The pewter plate, cup, and vase share a dull gray surface.

Etymology
Old French peautre named the tin-based alloy. The material's use for plates, pots, and vessels also led to “pewter” meaning tableware made from it; its deeper origin is uncertain.
In context
Because of that pewter flasks were introduced which is a mix of tin, silver, lead, copper and other elements.