6pcs Whiskey Stones Sipping Ice Cube Cooler Reusable Whisky Ice Stone Natural Whisky Rocks Bar Wine Cooler Party Wedding Gift Guarantee: Our whisky stones are all made of natural granite/marble, which will not react to water, alcohol and or other drinks, and regarded as safe by SGS (with reference to European Council Directive 84/500/EEC & 2005/31/EC(articles intended to come into contact with foodstuffs) You can ask us for SGS Test Report if you need. Features: Eliminates the ice that melts in your drink Really cool to use and make a fantastic gift Has no flavor or odor that would effect your drink like normal ice Rounded edges prevent scratching to your favorite glass Completely washable and reusable As stones are all natural, so there might be some color difference/pattern difference. Specifications: Material: natural stone Color: black, gray, white Item size: about 2*2*2cm/ 0.78*0.78*0.78in (+-2mm tolerance as cut by hand) Item weight: about 17-22g per stone(different color, different weight) Usage: Clean the stones, stock them in your freezer for 4 hours above, serve 3 stones to your drink(liquid height no more than 1 stone height, normally 3stones only serve 60ml/2 fl oz liquid), stay for a while and enjoy your cooling drink Packaging: 6 stones in a velvet bag and then in an OPP bag to be a set Package includes: 6*stones 1*velvet bag