Flat panel autostereoscopic 3D display is a mature and productionready technology which employs specially designed optical devices, such as lenticular lens arrays, parallax barrier, and directional backlight. To overcome the restricted range of viewing angles and distances of these approaches, SONY RayModeler [Ito et al. 2010] and Osaka university [Yagi et al. 2011] have developed new omnidirectional displays. However, their approaches require the use of high cost equipments, such as high-speed rotary motor with synchronous control system, 2D LED dot matrix, high-speed multiprojector, fog screen generator, etc. In this work, we showcase the design and implementation of a novel 3D display, Omni-Tube. It is designed to be low-cost, compact and easy to use. It can be easily mounted to any commercial micro projector, hence it is suitable for various applications, such as virtual interactive exhibition in a museum or during a conference meeting. Copyright is held by the author / owner(s).