I had a Sunbeam Hot Shot, but it was too small for a mug. I gradually worked my way up to a 3000 watt induction hob. I pour the 12 OZ of water in the kettle and turn it on. I take the tea bag out of the Tupperware and put it in the mug and before I close the cabinet, the water is boiling. The trouble with the water out of the instant hot is that it is not boiling hot for tea. I guess you could make a smaller amount of tea with the boiling water from the Hot Shot and then, after the tea is brewed, you could add the hot water from the Instant Hot. Do tea experts think that would work? Have you seen the one cup drip coffee maker they made using that design? I saw one in Harvest like the big Sunbeam ADC of the 70s they had the nerve to call a Coffeemaster.
The instant hot is great, though, for running hot water over the big end of hard cooked eggs after you crack them. Then you hold them under a small stream of cold water and peel the shell away beautifully and easily.