Porcelain Lithophane Trick Puzzle SteinIt features a country farm house with a man and woman in a boat, cows and distant bridge. There is a lithophane on the bottom of the mug so when you figure out how drink your beverage all the way to Bottoms Up (to the lights) it will be illuminated!It is in Excellent Used Condition. There are no chips, scratches or repairs.The mug has holes throughout making it impossible to drink from unless you know the trick…If you don’t know how... to solve the puzzle, I will reveal the solution to the winner and include it with the stein. ;)It measures 6¾” tall x 3½ wide (top) 4¼ wide (bottom)Is Marked R.P.M. Germany on bottom Please Review the Pictures which are provided as an Integral Part of the Item Description and Contact Me if you have Any Questions. Please note these are magnified photos to give you detail.