Ice is essential for many mixed drinks, and ice molds make it easier to have the right size of cubes. You can find a variety of products from Bar Lux with black silicone molds. They come in a range of sizes with just a few cubes per mold or up to six or even 15. They may form tiny cubes just one inch in size or long slabs over five inches. You can find round or square molds to fit your glass and drink.