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Used these to syringe feed a poorly guinea pig. They are great quality & much cheaper than I paid to buy one from the vet. Also can stand up to being washed in the dishwasher without losing the measuring guide.
I thought they could outlast a little more than the marketed use since I didn't want to use them as a complete single-use. So if you want something more durable buy something else. If you are really looking for single-use, then these are perfect.