I only use commercial vinyl - 5-7 year outdoor life as well as UV protected. Your glassware has been made with care and attention to detail. All handmade items may contain small imperfections. Please treat with care. Hand wash only. Do not soak. Not dishwasher safe. Not microwave safe. Avoid extreme heat. Coffee Mug is 12 ounces. If you have any questions, please do not hesitate to message me.