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The original was posted on /r/whatisthisthing by /u/The_Icecream_Man_ on 2023-10-05 15:43:08.

Original Title: I work in a vet’s office and we just took this out of a cat’s intestine! The top is soft and hollow, the bottom is hard and the ring indents are circular, not in a spiral like a screw. About 1cm in length.