Settings for vase mode in CURA?
Vase Mode changed the name in some version before 3.5. Now you can achieve this with 2 modes: "Surface Mode" and "Spiralize Outer Contour". To turn it on do this:


Choose the Custom setting menu on the right
click a gear to set up what settings you want to see
Under the header "Special Modes" you find both Surface Mode and Spiralize Outer Contour
set the checkmarks on both


Turning on the Surface mode to Surface and checking Spiralize Outer Contour gets the "classic" Vase Mode.

Turning on Surface without Spiralize Outer Contour gets an infill-less outer perimeter

Now, the classic Vase mode will only print the single most outer perimeter of a print, so your model will have to be very limited with angles and contain no bridges - with one perimeter, you will only be able to print at best 45° angles!