Whose Cap Chair (or Stool) was First?

A couple of days ago Sander van Heukelom drew my attention by linking to the above video on Chair Blog’s FB Page.

Then Design Milk drew my attention announcing the Cap Chair by Studio DFTS ( DFTS stands for Don’t Feed The Swedes).

Now I ask you: Whose Cap Chair was the first?

Sander’s?

or DFTS Factory’s?

I asked Sander and he claims on FB:

My first prototypes of the Fat Cap Chairs are from 2007. I had my first solo show with the Fat Cap Chairs at Outland Modern Art Gallery in Amsterdam with the title “The artistry of the cap” in 2008.

DFTS claims their first model was from… 2005…..

I found Sander’s a year ago