Check out this great design from cafepress Castle in Germany Coffee Cups
Castle in Germany Coffee Cups. this beautiful castle rises above the river, once home to royalty I am sure it would have collected tolls along this river. ©Amy Marie 2004 chasingthegnome Product Information Wake up and smell the advantages of our space-saving Stackable Mugs. Each mug has a slightly-pinched base so they stack perfectly together (just place one on top of the other for convenient storage). The outside of each mug is retro-white, but you choose the inside color: Avocado, Sunflower, Sky blue, or Papaya.Holds 13 ouncesDurable ceramicMicrowave safeDishwasher safe (use top rack)Individually priced, so you can mix or match to build a setStack up to 4 mugs