The Froz Ice Ball Mold creates 4 x 4.5cm slow melting ice spheres that are perfect round ice cube maker with the easy twist. This silicone ice mold tray is made of food grade BPA Free and FDA grade silicone approved. It is durable and easy to use. This Froz Ice Ball Mold is also dishwasher and microwave safe. Fun kitchen gadgets that let you enjoy your favorite drinks without diluting them as quickly.