Poor baby had a cyst removed from her side, and was sent home from the vet in the Cone of Shame. She was really freaked out wearing it, and a neighbor suggested we find one of these inflatable donut things. A lifesaver! It fastens to her collar and doesn't seem to bother her at all, but prevents her from chewing on her stitches. The image kept reminding me of something, and I finally put my finger on it...
Pic from here.
Edited to add: Here's the origin of "Cone of Shame".