Our reusable mugs are made from biodegradable and compostable CPLA (Crystallized –PLA), which is a nature-based NatureWorks® plastic made from corn, an annually renewable resource. Best “going green” option for its reusability. At the end of life, CPLA based products can be recycled or composted under commercial composting conditions within 90 days. CPLA Mugs can be custom printed on both sides. CPLA is a nature-based NatureWorks® plastic made from corn, an annually renewable resource. CPLA is high heat tolerant up to 212 F and microwave-safe.