You might be the one who's in hot water when the recipient of this cheeky mug realises it's hidden message. Make a brew and watch the seemingly innocent birthday proverb disappear to reveal a rather more naughty announcement!
- Heat change mug - add hot liquid to reveal the hidden message
- Remove peelable label to maintain the element of surprise as they take to time realise the alternative message appearing
- Not dishwasher safe - wipe clean only!
Old as F*ck Heat Change Mug Reviews