Sounds expensive compared to boiling a kettle. I actually looked this up, boiling a litre of water in a kettle costs about two pence and I’d only boil around half a pint (~280 ml) for this costing me 0.56p per go. That device retails for about £30 where I live so I’d need to be bitten badly enough for it to be a problem about 5,350 times before it’d be worthwhile.

I guess it depends on whether the device is durable enough to last that long, and whether or not you’re careful enough to avoid burns with the spoon method!