Check out this great design from cafepress help stop global warming Coffee Cups
help stop global warming Coffee Cups
help stop global warming Coffee Cups. help save the planet and protect it for future generations. global wamring is happening, wars are occuring over oil, we need to stop the fighting and work together and make the planet better for every 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