Two years ago, a startup called Eazao raised $284,514 to fund their Cerambot, a desktop contraption that 3D prints clay. Intriguingly, you're meant to use your microwave as the kiln.

The build volume of the Cerambot was just 150 x 150 x 240mm, or 6 x 6 x 9.5". Now the company's producing larger-capacity printers called the Matrix line, which has a maximum build volume of 500 x 500 x 700mm, or 19.7 x 19.7 x 27.6".

"In addition to ceramic materials, Matrix can print using a wide range of viscous fluids," the company writes, "especially environmental and ecological restoration materials:"

However, the company neglects to provide any links to sources or practical information regarding those materials. Sure, I can get my hands on eggshells, coffee grinds and paper waste, but how do I feed that into the machine?

In any case, here's what it looks like in action:

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The machines are not yet ready to launch. The company is soliciting sign-ups now, where you trade your e-mail address for a guaranteed early-bird price of $799 (they don't say for which size Matrix machine, so I assume it's the smallest one).