Vortex Vase with flat bottom Free 3D print model

The floor of the original vase is rounded upwards, which not only causes printing problems, but makes it difficult to use it as a tealight holder because you'd have to balance the tealight in the middle. I simply removed the entire bottom of the vase, and replaced it with a thin cylinder -- flat on both sides. Update: I failed miserably at printing it, anyway! I guess I need some supports at the top...