A tin filled with copper ore is used in Recruitment Drive during the Miss Cheevers challenge. It is one of the 9 stages of tins used during the quest. The tin with a key impression filled with copper ore is created by filling the tin with a key impression with cupric ore powder. It should then be used with tin ore powder to create the tin (tin and copper). This continues the plaster cast for the bronze key needed to complete the challenge. Using the wrong ingredients can result in a useless tin (strange).