This 10 fl. oz Behind the Lines heat reveal mug is the perfect fun gift to surprise a friend, colleague or family member. Simply add hot water and thanks to a few mischievously vanishing letters, the message on the front makes an unexpected change!
The message on this cheeky mug changes from 'Keep Calm. You Must Be Bold and of True Grit' to 'Keep Calm You Old Git'
Tea breaks are meant to be fun and with this surprising and funny heat reveal gift mug, there's sure to be plenty of laughter!