Obviously, we advocate drinking your bourbon on its own and savoring its flavor. We prefer our bourbon chilled, so we almost always take our drinks on the rocks. What we don't like, however, is diluting our whiskey. So we solved that problem with great big ice balls. Ice balls have a lower surface area than regular ice cubes, so they don't melt as fast, which means they cool your bourbon without watering it down. There are a few options for ice balls. We got ours from Muji and couldn't be happier with it.