Gadget for restraining Unruly Threads

I am currently participating in Arachne's Secret Pal exchanges and have just received the acknowledgement (via Bev, the co-ordinator) for the last parcel I sent to Diana. together with a photograph of Diana's latest project, a torchon scarf made with a variety of thicker threads, which shows an ingenious method of taming some of the more unruly threads. I think the little clips she is using are really small hair clips, but it looks to be a very ingenious use for them.

My Secret pal's pillow detailof thread retainer
My Secret Pal Diana's pillow - she is making a scarf using a variety of thick threads. Detail of a thread retainer - I think it is a mini hair clip.