The ice ball maker is a mold with a tray and a lid, the block area of the mold is spherical (may also have other unique shapes),.
An ice ball is a large, round piece of ice that melts more slowly than ice cubes. Averaging two inches in diameters, the spherical ice prevents watered-down drinks, so there's no need to worry about your scotch on the rocks, whiskey and cola, or any other cocktail getting too watery before you're done with it.
Ice balls work best for certain types of drinks and there are a few easy ways that you can make ice balls at home. For the average person, an ice ball mold is the most practical and popular option. Easy to find (especially online), you can choose between an aluminum press and a two-piece plastic mold.