A good non-glass option for a microwave turntable is a microwave-safe ceramic or silicone turntable. These materials are heat-resistant and can withstand the temperatures generated inside a microwave. Ceramic turntables are often found in some microwave models as an alternative to glass. They are durable and provide good heat distribution. Silicone turntables are a more recent option and offer flexibility and durability. They are designed to be non-slip and can handle the rotational movement required for cooking or heating food. When choosing a non-glass turntable, make sure it is explicitly labeled as microwave-safe to ensure it can withstand the heat and rotational forces of a microwave.