Taken from Customizable ring-shaped bobbin holder by NicApicella and modified.

http://www.thingiverse.com/thing:971461

I've added a base so you can put things inside the bobbin holder. You can also add names/words/pictures to personalise the print - see photo for example.

Files here are a plain base and one with the word BOBBINS - I add the text using 123D Design. All prints on my Velleman K8200.

Edit 12th June 2017:
Two new bobbin holders added:

1. Scottish thistle in the base
2. A load of Scottish bobbins as text

I have found a 20% infill works just fine on my printer,

Enjoy,