It's a flashback from your favorite childhood novel, "Matilda" to send some love to your teacher like the way she did!
Care instructions for Mugs :
Wash in warm water with a non-abrasive sponge
Do not scrub using sharp or metal sponge/objects
Not Microwave/Dishwasher Safe
Do not expose the mug to direct sunlight for long periods to avoid the break-down of colors.