Wilton-Silicone Candy Mold: Heart Words Can Express. Make Valentine's Day treats made using this Conversation Hearts Silicone Mold! Use it to bake brownies and other mini treats, mold candy or fondant cupcake toppers and more. Over, freezer, microwave and dishwasher safe. This package contains one 7x12-1/4x1 inch silicone treat mold with twelve heart cavities in six designs (two of each design). Imported.