Designing a Disney "90 Years of Mickey" coffee mug involves incorporating iconic Mickey Mouse elements, such as his silhouette, gloves, and ears, to showcase the evolution over the years. Utilize a classic color palette like black, white, and red, with hints of gold for a celebratory touch. The mug should have a timeline showcasing key Mickey moments from each decade, along with a prominent "90 Years of Mickey" logo inside the mug which is visible when you sip your favorite beverage.