Our innovative ice cube tray can create three different sizes of hollow cylinder ice molds, specifically designed for 20/30/40OZ Stanley cups. Made from safe food-grade silicone material, our ice cube mold is odorless, ensuring durability and reusability. The highly heat-conductive silicone allows for faster ice cube formation, while the unique hollow cylinder design reduces melting time and preserves the undiluted flavor. These 0.5in thick hollow cylinder ice molds can be stacked to fit tumbler