Place the immersion heater in your container by hanging it over the lip (side) on the inside of the mug or pot.
Fill the container to the designated level on your immersion heater (do not submerge the heater and make sure the coils are not exposed to air). Fill the second container with water and set aside (this is your holding container).
Plug your immersion heater into the power outlet. Monitor the contents of the container for boiling over the sides and for overheating (i.e., boiling dry). When the liquid is hot, unplug the immersion heater from the outlet and wait a few minutes before transferring the immersion heater to the holding container to cool off.
Pour your hot water into your instant soup cup or add tea, coffee or hot chocolate as desired.