The surface area to volume ratio of a sphere is less than a cube of the same size or several smaller cubes. Less surface area means that a sphere will melt much more slowly than cubes, providing you with a drink that stays colder longer and is less diluted.
The cooling of quality drinks is preferably done with the perfect Ice Sphere, without impurities or air bubbles.
The advantage of these ice spheres is the fact that they melt 80% slower than the usual cubes, they cool the drink without diluting them excessively as other extra ice cubes do, they also have a pleasant shape.
The shape for the Ice Ball will help you get the perfect ice of the "Ice Ball" trend.