The Viski set of 4 black ice sphere moulds makes a fun & functional gift for whisky & cocktail lovers, creating long-lasting, oversized ice balls. The gift-boxed ice balls take just 4 hours to make in the freezer & are perfect for cooling whisky while diluting it less than traditional, smaller ice cubes. Slices of fruit, berries or herbs can be added to the moulds for decorative effect & added flavour.