Crystal clear ice spheres (2.25" Diameter) by Houdini are not only beautiful, but functional too. The ice contains hardly any bubbles or impurities making for denser ice. The denser ice melts slower than regular ice - ideal for those who like to keep their drinks cold and strong. Houdini by Rabbit, Shake it up! Whether you are an at-home mixologist or an amateur wine connoisseur, Houdini by Rabbit provides exceptional tools to inspire you to celebrate the moments. Like Rabbit, Houdini is continually evolving and takes pride in delivering quality and value.Care Instructions: Silicone Ice Mold Cover - Top Rack Dishwasher SafeTrays - Hand Wash OnlyTo UseFill spheres with waterFreeze for 24 hoursDefrost and release crystal clear ice spheresCheers!