Each clay cup is unique and handmade in Prince Edward Island, Canada. For thousands of years, people have drank from raw clay vessels, it is the original wine glass. The secret to our clay cups is their ability to remove unwanted tannins through their unglazed clay surface and deliver an enhanced wine drinking experience. To ensure many years of enjoyment it is important that you never wash this vessel with soap. Soap will block the pores that are naturally present in the clay. Simply rinse the cup with hot water and thoroughly air dry after use. The glazed edge of the cup can be wiped clean with a damp cloth. Do not nest damp cups together or put in the dishwasher.