Make Circular Ice From Water Balls
One large piece of ice makes any cocktail effective, especially since you can make it round. Fortunately, this is a fairly straightforward way.
In addition to making a large block of ice look cool, it will melt more slowly than several smaller ice cubes, which will keep your drink cooler longer and drip less as the ice melts. Simply fill small balloons with water (or whatever liquid you wish to freeze) and place them on a baking sheet in the freezer until they’re done. Cut off the end of the balloon, remove it from the ice, and hear a pleasant clang when you drop it into your glass.
How to Make Round Ice for Luxurious Cocktails Without Any Special Shapes | WonderHowTo