Graycano Coffee Dripper + Pro SleeveThe graycano dripper is the first dripper made out of aluminium with a high end technology coating. The graycanos double wall cylinder helps maintain the heat in the inner conical wall, retarding its loss to the ambient temperature, which sustains even more a temperature consistency during brewing. The unique V shaped structure (the Lava Ribs) has many functions and was carefully engineered so that through the combination of this functions the perfect