Maybe ok for just water
Purchased these as replacements for the vet provided "single use" plastic plungers that become very stiff and difficult to plunge. Sadly the other 1-star reviews are spot on mentioning that anything other than water will get trapped behind the silicone gasket. I haven't tried to pry the gasket out and clean the tiny spaces behind it that are clearly trapping food. It's a shame, as the action and design of these syringes is otherwise great -- they really do work so much better (and my only reason for 2-stars instead of 1) -- but at the higher cost I would've expected someone to have tested the "reusable" aspect a little more thoroughly.
Rating: 2 stars