Balsamo 10 oz Ceramic Mug with Cork Base is made of ceramic construction with a natural cork base. The tumbler has a matte exterior and glossy interior. The rubber seal lid has sliding drink opening and the natural cork bottom prevents furniture scratches and provides a non-skid base. The durable ceramic has a non-metallic taste, and will not rust or stain. Hand wash only. Do not put in microwave or freezer. Measuring 10oz, this custom balsamo 10 oz ceramic mug with cork base. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. Customization: Logo printing available with multiple packaging and color options. Product Highlights: BPA-free, leak-proof, travel-friendly.