An easy way to get temperature controlled water with a standard kettle is to figure out how much cold water you need to add to the bottom of your mug before fil

An easy way to get temperature controlled water with a standard kettle is to figure out how much cold water you need to add to the bottom of your mug before filling it with (just-boiled) water from the kettle. If you want more accuracy, you can use water from the fridge (which is better at keeping constant temperature than your cold water line).