To provide an epoch-making copper-made article having unprecedented extremely high commercial value, which is placed in a water basin used for flower arrangement, aquiculture, or the like.

This copper-made article 2 to be placed in a water basin 3 which is used for flower arrangement, aquiculture, or the like, is constructed by knitting or weaving a thread member 1 made of copper. The copper-made article 2 has bactericidal action to kill bacteria in water by bringing it into contact with the water filled in the water basin 3.