I Pawlemly Swear I'm Up to No Good Harry Potter Black Mug-12oz

Do you solemnly swear you're up to no good? So does your cat. Always.
"I pawlemnly swear I am up to no good" on the front of the mug, and "Mischief meownaged" on the back. Because cat puns plus harry potter plus coffee is basically the pinnacle of human achievement.