After reading Ubasoons post about Tuna and the surgery he just went through to remove a plastic pull thing from mini-blinds, I thought about this danger. My vets have removed MANY of the milk jug rings from cats intestines. I used to think nothing of ripping them off, and throwing them down for the cats, but haven't for a few years now. Too risky having them ingest them, and cause a blockage. Intestinal surgery is very expensive, and if this post mkes a few people think..it's worth it. I wonder how many cats have gone under the knife over those seemingly harmless 'toys'?