How does this 3D printer manage to be so small and cost only $99?

The ONO 3D printer is a bit tricky to understand but the idea behind it is awesome. Simply put, ONO uses a special type of 3D printing liquid (Risen) that hardens under white light of a smartphone screen instead of UV light. It works with both iPhone and Android as long as you have the app installed. 3D samples are availble for free to print within the app or you can upload your own. What would you do with it? ONO is shipping now to people who supported the Kickstarter campaign but expect to see this portable printer in stores and online soon.