I thought that the Fairphone T-Shirt is better worn outside the Fairphone office, where it has more advertising power. 
Thank you for sharing the details about your project! 
@ungutknut is working on 3D-printed covers for the Fairphone 2. Maybe the QI receiver can be integrated there.
More photos (and GIFs). 
Us sitting in the famous Fairphone amphitheatre, listening to @iratxe’s workshop.
@Iratxe explaining very vividly.
@Amber presenting his group’s answers to @Iratxe’s concluding questions.
@jayy presenting his QI connector board via Skype.
Sito,…
…Indre and Damiano explaining the FairBnB Coop.
@Chris_R chipping in to the discussion.
Thanks to all, who prepared workshops and gave us so much interesting input! 