Neptune Ice Ball Tray
In a cocktail, a large sphere-shaped ice ball melts more slowly than multiple regular ice cubes do, minimizing the watering-down of your beverage. It's all about surface area -the less the better (if you remember high school science class. I didn't.)
These trays are easy to use: just fill the bottom tray all the way to the top, put the upper tray in place (the displaced water will squirt through the holes) and freeze. Makes two 2-1/4 inch spheres.
Made of food-safe silicone rubber. Dishwasher safe.