I love this idea from Barb Conway (studio 16 cards).
Using Stazon ink. Roll the stamp with firm pressure over the curve of the cup. Be warned… it can take several goes to get it right. Thankfully Stazon cleaner wipes it clean for each new attempt. Once you are happy, bake it in the oven at 175 degrees C (350 degrees F) for 35 minutes, to set. (I would suggest a hand wash only after this).
Any stamp can be used but you’ve got to agree, this cute little doc image works so well along with the ‘Keep Calm…’ sentiment.
Give it a go and then, please upload and link a pic in the comments box below.