Custom honeycomb ice cube stamp , custom cocktail stamp tool , wiskey stamp , soap stamp barware business logo ice cubes gift for bartender. Perfect gift for cocktail lover , bartender , wine lover , whisky lover. Materials :metal brass(70% copper and 30% zinc). Depth to engrave: 2.8mm - 3.2mm.Thick and high quality brass which is very durable to use. This item is made of brass.