※ Silicone is extremely stable properties. ※ The silicone: heat-resistant temperature of -40℃ to +230℃ (-40℉ to 446℉), can be re-used, innovative design, soft, varied styles, stripping easy, and easy to clean. ※ The "basic rectangle 3.8 oz" shape is large enough to embed smaller shapes or toys inside, or it can be used to make pretty, colorful soaps to fit with any decorating style. ※ Applied to microwave heating, oven baked, non-direct contact with flame cooking, cold storage and freezing. In addition, the silicone material can direct contact with food without any problems.