Back in school, getting up every morning and dragging yourself to school was like the hardest thing in the world! Still, looking back now, it's hard not to feel sentimental, especially if you were lucky enough to attend one of the finest schools for wizardry and witchcraft ever to have existed: potions class, extremely dangerous broom sports, murderous competitions against other schools ...
Oh, and let's not forget that someone had the brilliant idea to let evil, soul-sucking creatures guard the school grounds. Genius, isn't it? Fortunately, the spell that's shown on the Expecto Patronum Mug exists. Once cast, some sort of guardian spirit will appear and protect the caster from harm! And the best thing? The Patronus looks different for every person! Sometimes it's an otter, sometimes a worm and sometimes a stag :).