It's Peanut Butter Jelly Time Coffee Mug White (15oz) by Moonlight Printing Welcome to visit our durable mugs.This is a morphing mug. Just plain black in color when it's cold, this magical 11 oz. mug will turn white when you add HOT beverages It has a large handle that is easy to hold and comes in 11oz sizes.Your favorite photo or funniest saying is a great way to start the day.Use our custom mug to showcase your creativity.From now on, own a unique, delicate designed mug that brings lucky to your life!