Pewter known as "trifling metal" or "trifle", was used for holloware and is made up of fine metal with approximately 4% lead. The last type of pewter, known as "lay" or "ley" metal, was used for items that were not in contact with food or drink. It consisted of tin with 15% lead. These three alloys were used with little variation until the 20th century. Older pewters with higher lead content are heavier, tarnish faster, and oxidation gives them a darker silver-gray color. Pewters containing lead are no longer used in items that will come in contact with the human body
Metal Slug Android, Windows Phone, Nintendo Switch and also for PC via Steam. Subsequent main games and spin-offs were created for platforms including Nintendo DS, Neo Geo Pocket Color and Game Boy Advance. A collection of the first seven games in the main series, including the "Metal Slug X" remake, "Metal Slug Anthology", is available for the Wii, PlayStation Portable, and PlayStation 2, with a similar collection, "Metal Slug Collection PC", being available for PC, while a revamped version of the seventh game, Metal Slug XX is separately sold from the collection. A spin-off tower defense game, "Metal Slug Defense", was created