The RockRoller brings two elements, chilling & motion, to the scotch or whisky drinking experience - place the chilling balls into the glass and pour drink into glass roll and enjoy. The dual stainless steel chilling balls chill faster and longer with ZERO dilution. A simple wrist motion rolls each of the chilling balls around the bottom and the outward curve prevents them from rolling out while sipping. Includes rock roller glass, two stainless steel chilling balls, stainless steel tongs and premium tube packaging. Dimensions: glass capacity 450ml, dimensions are 10cm high x 9.7cm diameter, ideal for 236ml of spirit, chilling ball is 3.75cm diameter.