I'd love to give credit to whomever came up with this brilliant idea I found on Pinterest, but if you follow the link back, it appears to have been pinned from google.com instead of the original source. Hopefully, I can do a little digging and find it. It is however a great idea! Edited to add: looks like the idea may have come from here, but I have yet to find the actual picture/post.
These are those toe separator thingies for pedicures! They are made of foam so you could probably use them as a pin cushion in a pinch. I think these would be great for when you are traveling with your machine.
Remember, if you are pinning pictures, do it from the original site, not an index page or the main page of a blog. As the content of these index and/or main pages' content changes, the link becomes useless.