Thumbs Up I Spat in This Mug

What looks like an ordinary white mug is, in fact, a drinking vessel harboring a gruesome secret, only to be discovered when the user sips their last dregs of tea or coffee. Printed on the cup's inside base is the yucky sentence ‘I spat in this mug.' The disturbing message is designed to swim into view only as the drinker finishes the contents, inspiring grossed-out groans all round. After all, while we're sure you'd never do such a thing, it's enough to get them worried. In fact, if you make tea for your workmates in this undercover joke mug, we guarantee they won't ask you to do it again Thanks to this novelty mug, office pranks have never been so easy to play you even get to make your target a lovely cuppa in the process so he or she won't suspect a thing. Will you be able to stop yourself from giggling at them? Half the fun is not letting on.