Crystal Vase. This design was actually inspired by Kryptonite (dork alert), if Superman was going to have a vase in his fortress of solitude, it would probably look like this. With ice/winter blue colors. Designed in Blender. No supports!! YAY!

I include a version that is just a shell, if you wanted to try to print it in surface mode (kind of like vase mode, but since this is not one continuous surface vase mode would not be applicable).