KOKUBO Ice Tray Tumbler 8.6"x2.9"x2.3" (22x7.5x6cm) Cube Mold Maker White Product description Compatible with wide-mouthed bottles with a diameter of 1.7" (4.4cm) or more Ice size: Approximately 1.5 " (4cm) in diameter and 3.9" (10cm) in length The wavy shape of the ice expands the surface area that comes into contact with the beverage and enhances cooling efficiency. Since the volume of ice used is reduced, the taste of the beverage will not fade easily. Please use as a guide for 1 piece for a capacity of 0.36 qt (350ml) to 0.63 qt (600ml) Product information Number : KK-106 (White) Dimensions : 8.6"x2.9"x2.3" (22x7.5x6cm) Material : Polypropylene Temperature : -4?~212? (-20?~100?) Made in Japan How to use Open the lid and fill the tray with water. Cover the lid slowly. Please put the tray in the freezer. If you dip tray in water, it gets better. Tips for getting clear ice : Cool the water after boil the it, and put the ice tray in the freezer.