A tin filled with tin and copper 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 filled with tin and copper is created either by filling the tin with copper with tin ore powder, or by filling the tin with tin with cupric ore powder. It should then be used on a bunsen burner found in the room to create the tin (key). 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).