Sometimes, you've got to crack some jokes to make a pie. Most people know from maths class that the number ? is invaluable for many calculations - and coincidentally sounds like the food pie. Fortunately for us, the fun doesn't stop there since many homophones exist in the realm of mathematics. Like with this mug, where you can show the world that you 2³ ? ?.!

Translated into English the slogan reads "I ate some pi". The root of -1 hints at i, 2³ is 8, the sigma indicates a sum and - as mentioned above - ? sounds like pie. To give the non-initiated a clue what the joke is about, we've added "...and it was delicious". Who knew that was possible to combine maths and linguistics in such a harmonious way?