I use the tubes as well as feed tubes and find them very good. The only problem was mentioned here: The silicone lip makes a slight noise when it expresses and the air "escapes" ("pfft"). My dog finds something stupid, so I just clipped a portion of the silicone in a tube. But my dog does it nothing and he is enthusiastic about the Tube. It varies depending on the dog, but therefore just a star deduction. Still highly recommended. Shipping also went smoothly and quickly.
