Mixing design with functionally, the Heatwave is an actual modular heater that is crafted of concrete and aluminum, and is consolidated by glass fibre (whatever that means). The prototype was first designed in 2003, but until recently was not made for sale to the public. Apparently, a water version will appear on the market by 2007. Gotta wonder about burn exposure here? Anyway, putting aside curious reaching hands, the product can be ordered by contacting firstname.lastname@example.org (here comes the SPAM).
Product page here.