The new Brewista Tornado Duo Dripper is the world’s first sealed, double-wall glass dripper. Our unique ribbed filter slows the pour over-extraction time to give your coffee a more robust and satisfying taste. With a stylish design, the tornado is essential for every coffee lover’s toolkit. Unique 18-rib Tornado filter for optimum extract Insulated double-wall glass Sealed easy-to-clean design Use Size 1 Brewista Cafec Filter Papers for Size 1-2, For size 2-4 use Size 4 Brewista Cafec Filter papers Heather Perry of Klatch Coffee | Brewista from Brewista on Vimeo.