
The joke, explained
Invisibility is hard to show on a coffee mug, which sits in plain sight and asks "Invisibility shirt check. Can you see me?" anyway. What does "Invisibility shirt check. Can you see me?" mean? It means the sound check "mic check" becomes a test of whether a garment hides its owner, and any answer proves the trick failed. This funny fashion coffee mug passes the test by failing it. As a sarcastic fashion coffee mug it suits the break room. As a fashion birthday gift it suits the friend who blends into it, like funny fashion coffee mugs for adults.