this vase was created by a happy accident while playing around in openscad.and as happy as i am now i'd like to share it with you...
update 20171019:... new model uploaded (V3) with corrected scaling (200mm)
the design of this vase is based upon a custom made guitar pick/plectron (PLActron - the customizable & biodegradeable guitpick), which is rotated 240 degrees around the z-axis an extruded along a sine in z.
this model is scaled to be printed with 20cm height,
which should fit most printers and most flowers.
you can download not one, but 3 different versions of this vase.
while the smallest with 32 segments adds some interesting geometry, the 500seg is the way to go if you want a smooth shape,
if you can't decide take the 100seg-version
slicing suggestions for Cura 15.02.1
Standard config
Print Speed: 42mm/s yes, this is essential
Layer Height: 0.1 mm
Shell Thickness: 0.8mm
Retraction off
Bottom/Top Thickness 1.1mm
Fill Density: 0%
No Support, No Platform adhesion
Expert config;
Section Infill: uncheck "Solid infill top"
Section Black Magic: check "Spiralize the outer contour"
this model is quite easy to print, no overhangs and no detailed structures, you could print it in 0.3mm > Layers without much hesitation.