Which adorable BTS BT21 character is your favorite - Koya, RJ, Shooky, Mang, Chimmy, Tata, Cooky, or Van? You're sure to find them here in the vivid artwork covering this delightful Line Friends BTS BT21 Plastic 16 oz. Travel Mug. If you order this, you can take the gang with you wherever you go! Hand wash only. Not dishwasher safe. Do not microwave.