DURABLE TO USE: Walfos semi-circular silicone molds can be used over a wide temperature range of -40°F to 446°F. This durable and flexible silicone tray won't crack or break like plastic trays. You will find it ideal for making chocolate snacks. HOW TO USE OUR SILICONE MOLDS: First, place the semi-circular silicone molds in boiling water for 5 minutes before first use to remove the natural silicone odor (only required the first time). Second, Walfos chocolate mold balls do not contain BPA. Non-stick materials allow for easy release and are simple to clean. Chocolate releases easily from the mold. MULTI-FUNCTIONAL USE: Walfos semi-circle silicone molds are safe for use in the microwave, oven, refrigerator, freezer, and dishwasher. They can be used for making cupcake toppers, edibles, chocolate snacks, hard candy, fondant, butter patties, cake decorations, and more. EASY TO USE AND CLEAN: Non-stick design allows for easy release of chocolate by gently pushing the bottom of the mold. The flexible material makes cleaning and storage simple. PERFECT SIZE: Includes 3 different sizes of trays: - 11.3 x 6.6 x 0.55 inches, cavity diameter: 1.1 inches - 11.3 x 6.6 x 0.8 inches, cavity diameter: 1.4 inches - 11.6 x 6.7 x 1.3 inches, cavity diameter: 2.7 inches 100% SATISFACTION GUARANTEE: We are confident you will be satisfied with our silicone molds. If you experience any issues with the product, please and we will replace it or provide a full refund. We strive to ensure every customer is happy with our product and service.