Design Your Own Mug - 12 oz. Photo DIY Travel Tumbler Holds hot or cold beverages Insert size: 10-3/4" x 6-1/4" tapered Super easy to use, the twist the black top/inner liner to removed and insert your own photo or design Do-it-yourself travel tumbler, a blank insert included for decorating, insert a photo collage, kids drawing, or graphic BPA free, hand wash only