UnderTheSink is the household hazardous waste facility for Douglas and Sarpy Counties. It is owned and operated by the City of Omaha, for the benefit of the two counties. UnderTheSink accepts and properly disposes of motor oil and auto fluids. Learn more at UnderTheSink.org, or read this information provided by UnderTheSink when you click here. What Items Do They Accept? Acceptable materials include motor oil and auto fluids. For a complete list visit our Recycling and Disposal Chart and search for UnderTheSink.