Specifications: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.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 3 stones only serve 60ml/2oz liquid), stay for a while and enjoy your cooling drink!Type: Whiskey StonesMaterial: Natural StoneFeatures: Rounded Edges, Washable, Reuable,Item Size: 2 x 2 x 2cm/0.78 x 0.78 x 0.78" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 Set of Whiskey Stones (9Pcs)