I purchased set of 12 of the half glass set (3 boxes of 4). Unfortunately, I recently broke one. Went to customer service to see how I could purchase one glass to keep my set of 12 complete. Not only did I receive a response almost immediately, I found out that they have a warranty and I received not only one glass, but an entire set of four half glasses! And it came within 2 days of the final confirmation that the glass would be surprised. So now I have three extra to break in the future--hope not! I have purchased many things from this website and will be coming back. This was the BEST customer service I have ever received. KEEP UP THE GREAT WORK!