Unlike many of the other FRED Ice Tray products that claim to be Dishwasher Safe only to clearly see "Hand Wash Only" on the box, this product is Dishwasher Safe (see uploaded photo).  The product is fun, and is easy to clean.  As with all of the FRED Ice Tray products I have purchased, you'll likely need some cardboard backing to help you get this into your freezer more easily (the silicone mold is not rigid).