It's a F*CKING thermal mass the same way that Twitter is a weekend project. Weekend projects come and go with hardly a whimper. The hard part comes when you wa

It's a F*CKING thermal mass the same way that Twitter is a weekend project. Weekend projects come and go with hardly a whimper. The hard part comes when you want to turn that weekend project into something people will actually use (or in this case, pay for). Creating a compelling brand, crafting a marketing message that resonates, designing the product so that it "feels" good to use, engineering something durable and long lasting, scaling to meet demand et al? These things require a heck of a lot more than a class in thermodynamics. Regardless, the market has spoken and 300+ people saw enough value in this thermal mass to support it.