The color changing mug is a guaranteed FUN GIFT. They also make a great BIRTHDAY, ANNIVERSARY or GRADUATION gifts, or simply to say I love you.These 11 oz. coffee mugs will be sublimated with your favorite picture and lettering may be added as well. Simply email me your picture in a jpeg or bitmap format or you can send through the mail and it will be returned. These are made with a sublimation process that causes the inks to penetrate the coffee mugs leaving a smooth and bright finish. Surprise people and watch their eyes as they watch a picture appear before there eyes when HOT liquid is poured into the mug. They can be washed in a dishwasher, but hand washing gives the a longer life. Please email me with any questions.