This mug is done in the style of Leonardo da Vinci, right up to the mirrored hand-writing he used for his texts. “Practice random kindness…” ist not actually hidden, but just translated into Italian. The additional text has been taken from our Italian “traffic shaping” page.
The “42” is hidden in the dice’s visible pips, the current year can be gained by counting the corners of the geometric objects: “20” + “6+5=11” = “2011“.
In the text the letters “r,o,j,v,n,b” are rendered in a slightly lighter tone, the letters “e,m,f,a,v” slightly stronger. By applying the Vigenère cipher with the correct key (3–6–15–19 = “cfos“) one gets the names of “Martin” and “Chris”.