Custom shaped bokeh holder

Inspired by http://youtu.be/zENUI8n0Rtw designed and printed a holder for custom shaped bokeh.
It holds cardboard stripes (70x30mm) with the shape cut on them.
Fits 77mm filter, I attach mine to the uv filter.
Samples:http://cesalv.deviantart.com/art/Custom-shaped-bokeh-test-1-482493552
http://cesalv.deviantart.com/art/Custom-shaped-bokeh-test-2-482493873