Experience the perfect cup of coffee in every sip with this ingenious coffee roller set. Simply add the ceramic roller to the bottom of the glass mug, pour in coffee, sweetener, and cream, and with a gentle wrist action, roll the ball along the bottom of the mug before each sip. Includes glass mug, ceramic ball, and stainless steel tongs. Mug is 4¾"h, holds 14 oz.