Copper is a natural metal that is antimicrobial. Meaning it kills a number of microbes such as norovirus, some strains of E. coli, and coronaviruses"”possibly including the novel strain currently causing the COVID-19 pandemic. You can find out more information about copper and its antimicrobial properties here. Zinc and copper are reactive metals that will continue to age over time. Oils and acids will change the surface. The copper will oxidize over time creating a greenish patina, creating a one of a kind table top. Because zinc and copper are soft materials, these tops are prone to light scratches. Eventually the patina will cover and blend all scratches and blemishes. If you''re looking for an eye-catching pub table, wine table, coffee table, dining table, or restaurant table, these are the ticket!• Please note that the rounds have a seam at the edge. If the tops are going outdoors, they should stay under a covered area. If water is to get into the seam, there is a chance the seam may swell.