The Singapore-based startup Gilmour Space Technologies has recently utilized specially formulated 3D printed fuel to successfully launch their self-made rocket into sub-orbit. According to the startup, the proprietary fuel is a culmination of two undisclosed materials, and is produced with their patent-pending 3D printer prototype. Gilmour Space Technologies plans to utilize their technology to provide both sub-orbital and orbital rocket launch services at a substantially lower price than is currently available. Read more at 3DPrint.com: https://3dprint.com/144711/3d-printed-rocket-fuel/