You can see that this is half section of the vase which can be rotated around left axis – like pottery.
Next go to Modify, click on + in front of the Line to expand her main parts and select Vertex. Now right click on bottom right vertex in view port and choose Bezier from this menu. Next set the right tangent to be horizontal and longer upon on your chose. Please keep the bottom part of vase to be more slant.
When you finish do this for remainig vertex to get shape like shown on next screens.



