It's the one I use also for piecing. For bobbins, I will wind 8-10 at a time and keep them in a small zip-loc bag in my sewing box. They are labeled and it's easy to change out when a new bobbin is needed. No need to stop and wind bobbins.
I've use white and a light gray color and just started on my third spool. The large spools go a long ways.