Standard teethers do not contain ice gel or water.  Water filled teethers typically have a portion of the teether that is filled with water. This type of teether can be placed in a standard refrigerator to cool.  Ice gel teethers typically have a portion of the teether that is filled with PURice Gel. This type of teether can also be placed in a standard refrigerator to cool. Once cooled, the gel is designed to stay cool longer than a traditional water filled teether.