I found out about these metal(available in brass, copper, and nickel silver) on Instagram( @ron.dean.142 ). Made of solid brass. Perfect to go with a brass Zippo. LOL.
http://www.trackofthewolf.com/Categories/PartDetail.aspx/106/1/SNUFF-BOX-B
http://www.trackofthewolf.com/List/Item.aspx/106/1
http://www.trackofthewolf.com/Categories/PartDetail.aspx/106/1/SNUFF-BOX-B
http://www.trackofthewolf.com/List/Item.aspx/106/1