Medical or veterinary appliances, instruments, products and aids, in particular nasal brackets, devices for spreading open the nasal apertures, spirals for inserting into the nasal apertures, bracelets, rings, necklaces, pendants or other products made of copper, a copper alloy or a material coated with copper or a copper alloy and which can be applied directly to the skin or mucous membrane especially in order to achieve an antibacterial, fungicidal, anti-inflammatory or antiviral effect; ai...