Go ahead - sink another round! Each reusable ice tray set features 4 icy Titanic ships and 4 Icebergs. Perfect for anyone that enjoys humor with a little edge, these Titanic Trays are guaranteed to be an unsinkable addition to your next party. Made of Silicone. Use them to make ice cubes, chocolates, gelatin molds and more! Freezer-safe. Dishwasher Safe.