No. The bottoms of our stoneware mugs are smooth.
Because the bottoms of Sunset Hill Stoneware mugs and steins are made of hard clay, there is a misconception that they can scratch surfaces. However, our mugs are sanded on the bottom to give them a smooth finish that won't easily scratch or snag on most household surfaces.
If you're particularly concerned about protecting your surfaces, however, we also sell coasters that have a soft neoprene pad on their undersides and absorb any condensation or spills from your mug. Please contact us online or call 800-509-4662 if you have any questions.