Traditionally scent, temperature and taste are the key elements for the enjoyment of scotch or whiskey. Now with the RockRoller you can add motion & chilling into the mix. A simple wrist motion rolls each of the chilling balls around the bottom and the outward curve prevents them from rolling out while sipping. The dual stainless steel chilling balls chill faster and longer with ZERO dilution. A pair of tongs are included for safe handling of the chilling ball. The Rock Roller Glass in this set features a unique design that sets it apart from traditional whiskey glasses. The glass is specially crafted to accommodate the included stainless steel chilling ball, allowing you to enjoy your drink without dilution while keeping it perfectly chilled.