"The award-winning Brewista Tornado Duo Dripper is our revolutionary, sealed, dual-wall glass dripper. Our unique ribbed design slows the pour over extraction time to give your coffee a more robust and satisfying taste. With a stylish design, the tornado is an essential for every coffee lover’s tool kit. Unique 18-Ribbed design for better extraction: The ribs slow down the flow of water through the coffee bed, allowing for more control over the brewing process. Insulated double-wall glass: The double wall uses air as a very effective insulator, keeping the heat inside the brew to create an evenly extracted cup. Higher brew column: Steeper angles and taller brew column increase the contact between grounds and water, allowing you to experiment with finer grind settings to produce more nuanced flavors. Glass won't degrade: Unlike plastic, glass won’t degrade over time, or develop pits or cracks that could harbor stale coffee flavors. Sealed easy-to-clean design Serves 1-2 cups (use #1 filter), or 2-4 cups (use #4 filter) Uses paper filters *Not Included"