Ideal gift: Heat-reactive mug "I love my colleagues...especially when I'm on vacation"

Thermoreactive Mug I love my colleagues... Mug with a hidden message that is revealed when you put boiling water in your mug... Empty your mug says: I love my colleagues.... So far so good, but when filled, your mug adds: Especially when I'm on vacation.... Color: green and pink The mug to leave casually on your desk. Packaging: pretty cardboard box French creation Do not put in the dishwasher