The process used to make the shoes is proprietary, designed in a collaboration between Reebok BASF and Rampf Group in Michigan, while final assembly of the shoes took place in Massachusetts. The shoe company says it's opening a Liquid Factory manufacturing lab in early 2017.

While these $189 shoes are available only as a 300 pair limited run on Reebok.com and Finishline.com, it sounds like more are on the way, and soon, since as McInnis put it, "One of the most exciting things about Liquid Factory is the speed. We can create and customize the design of shoes in real time, because we're not using molds - we're simply programming a machine."