Yeah our next big coffee purchase will be to switch to a copper coffee kettle and copper dripper. Its mostly so as to maintain proper 'thermal conductivity'. I did not include our digital laser thermometer mostly because i judge by the bubbles. I guess the best temp for coffee is 203°. Copper allows for less heat loss and the need to for concern with the heat loss from the thick glass from our current dripper. I also love the anti-microbial properties of copper!