Oh yes.. I forgot to say that I don't recommend the Dick Smith version of the electronic travel mug - the handle on the Dick Smith version is thinner, smaller, too close to the body and rather uncomfortable to hold. Jaycar version is a positive pleasure to hold by comparsion, and seems distinctly more rugged, on the whole.
And that the travel mugs in question are designed to be used in cars, running off the cigarette lighter socket, so you can brew your marijuana tea, while you're "hotboxing" the car till there's opaque cream fog inside, at same time....