For the best coffee results, use Cuisena's Coffee Tamper to tamp your fresh ground coffee before brewing. The Cuisena Coffee Tamper comes with dual tamping surfaces, 50mm and 55mm for different sized filter baskets. Cuisena Hint: For best results, handwash with soap and warm water. Do not place in the dishwasher. Each Cuisena product comes with an unconditional guarantee against faulty materials or manufacturing defects.