How about a pouch or sheath? It would add bulk, but it would keep coins from getting caught in the Squirt and keep the whole thing quieter. You could make one out of chamois cloth pretty easily. Of course if it fits well enough to not lose the tool, you may need both hands to get it out. I have a little leather open-ended bag that works well for a pocket knife. It is not attached to anything, I just use it to protect the scrimshaw work and keep the lint out.

Those gate clips and the fix-a-loc look cool, too.