
The copper tea kettle is:
It is known to be easy to work with and I think the color is beautiful.
Tidbit: Today it is also commonly used for electrical uses such as in wiring and tubing. (I know from experience when shopping that copper pieces in relation to plumbing are usually more expensive. It is usually much more durable to use than other products.)
When Did They First Appear?
Records of copper kettles have been discovered from the sixteenth century. Copper production in the 1500s included making:

As people started to migrate to North America, the demand for domestic and industrial copper climbed.
The new settlements used copper products in cooking and dining.
Native Americans brewed tea in a container made of wood. This was before they gained exposure to the concept of other types of kettles through contact with Europeans.
Side Note: I love any tea kettle but the microwave still sounds the easiest to use to me.
Though I do have to say, I have been known to leave the cup in the microwave for too long a time.
As you can imagine, the result was that the water actually exploded up out of the cup. Thankfully the cup was still in the microwave.
Anyway.....