Cup Testing

After previously testing my cups and choosing a form the heat retention was between 2:52 and 2:45 but to up that heat time I found an old tea preparation method known as Gong Fu which can be seen here.

http://jingtea.com/teaware/tea-sets/glass-gong-fu-set

The idea of this method is too pour boiling water in to all your cups to heat them. While the hot water in your kettle cools the cup heats. When the kettle water reaches the temperature required the water heating the cup is poured away and water from the kettle is used to fill the cup again with the tea for brewing.

This method increased the cup heat time up to .....