JOYFAIR MUGS, JOYFUN LIFE. Joyfair enamel coffee mug is an attentive product. From material selection to technology to production, every step is strictly checked, all in order to make every consumer to buy at ease and use comfortable. Product Information Red*1 /Green*1 /Blue*1 /Yellow*1 Capacity: 12 Ounce/ 350 ML Top Diameter: 9.2cm Height: 8cm Material: high quality iron with enamel coating Feature HEALTHY : Healthy glaze, rust free and non-toxic DURABLE: Ecellent iron, sturdy and durable, reusable multiple times EASY CLEAN: Smooth fine enamel coating, easy clean with soft detergent 4 SETS: Red/Green/Blue/Yellow, colorful cups give you a colorful life PORTABLE DESIGN: Lightweight material make it an ideal companion for any outdoor activities PRACTICAL: Perfect for hot/cold drinks, also can be used as a fruit mug, pens holder or other use you need Using Instruction 1. Please DO NOT compact the cups in case the enamel coating chip off due to the enamel properties. 2. Please use soft detergent to clean the cups to keep the beauty of its enamel surface, Hand-wash recommendation. 3. Please DO NOT put enamel mug into microwave oven owing to the metal material. Joyfair Service Support If you have any problem with your purchasing, please let us know by E-mail, we will offer our assistance in 24 hours on working day.