404 Error Black Mug – "Executive Function Not Found" Cute Demon Coffee Cup

This glossy black ceramic mug turns a morning coffee into a little act of defiant humor. A mischievous, gothic-style character in pink and purple detail sits beneath the bold phrase “404 ERROR” with the subtext “EXECUTIVE FUNCTION NOT FOUND,” making the mug feel like a wink to anyone who knows the struggle of scattered focus and burnout. The deep black background lets the vibrant print pop while the comfortable C-handle and smooth glossy finish make it pleasant to hold and drink from. Use it at your desk, in a cozy nook, or bring it to study sessions — it speaks a language of dark whimsy and exhausted brilliance that invites a knowing smile.

This mug pairs with late-night coding sprints, slow Sunday mornings, and weathering busy weeks. It belongs where people lean into their quirks: planners with worn calendars, students juggling deadlines, creatives recovering from creative blocks, and anyone with a taste for playful, slightly morbid charm. The art and type feel handpicked for those who appreciate tongue-in-cheek mental-health humor and bold, contrasting design.

Product features
- Glossy black 100% ceramic construction
- Available sizes: 11 oz and 15 oz
- Dishwasher- and microwave-safe
- Bright, high-definition print with vibrant colors
- Comfortable C-shaped handle; lead- and BPA-free

Care instructions
- Clean in dishwasher (put the product on top rack), or wash by hand with warm water and dish soap