Rubber stoppers are small, round pieces made of rubber that can be used to block or seal the openings of objects.
Sentences with «rubber stoppers»
Especially the raised food bowls with rubber stoppers on them. (pepperpom.com)
The heavy plastic ones that have little rubber stoppers on the bottom. (kerryblues.org)
Water is most often supplied via a water bottle with a screw on lid (don't use bottles with rubber stoppers as ferrets will chew and swallow the rubber). (drexotic.com)