I have sewing bobbins (vintage lot of 24) with assorted colored thread on them (black, gray, brown and tan).  They are "ATCO" brand.  Many have never been used but  I'm not sure I would trust these to use the thread as it is fairly old.  These are neat to display or use in other ways.

Sewing Bobbins Cardboard 24 Vintage

$9.95Price