Most fixtures are finished works when you buy them – with some notable exceptions, like plant pots and decorative jars or other clear glassware.
That is essentially the starting point for Pani Jurek, who arrays minimalist single and double hole-punched rings for you to suspend from your ceiling that you can fill with whatever you want.
His photographs demonstrate a few clever options, like colored liquid and greenery, but the sky (or at least the roof) is the limit – you could add sand and earth from distant travels or whatever you want to these intentionally empty vessels.
Be sure to check out rope lights (not what you kitsch holiday kind!) and other alternatively-styled lighting fixtures and conceptual products at GangDesign, and for sale alongside test-tube creations over at Etsy.