1) Download file
2) Generate gcode
The 3D STL is a closed file. I used Skeinforge to slice my prints (third one printing now). The 3D model is quiet tall @200mm and may not fit your 3D printer. Rescale or chop the top part to fit your printer.
Here's what I did generating gcode:

• 3 bottom layers
• No fill (obviously)
• 1 extra shell (making 2 shells on wall)
• Layer height 0,3 (to save print time)
• Remove the top 3 layers by hand (after gcode was generated)
  3) Choose a color.
  I personally like the semi-transparent materials for these objects.
  4) Print the vase. It takes 2:30 up to 3:00 hours on my standard Ultimaker with SF settings as described above. The result is a pretty strong and good-looking vase!
  5) Enjoy!