Final answer:
Michael got his "World's Best Boss" mug from a gift shop.
Step-by-step explanation:
Michael got his "World's Best Boss" mug from a gift shop. In the TV show 'The Office,' one of the main characters, Michael Scott, is known for proudly displaying this mug on his desk. The mug is a symbol of Michael's quirky and self-proclaimed title of being the 'world's best boss.'