The Flit Esso Insecticide Manual Sprayer from 1940 is a collectible item that combines the brand power of Esso with the functionality of a manual insecticide sprayer. Featuring a multi-color design, this original piece ties back to the gas and oil theme commonly associated with Esso. The sprayer likely served as a promotional item for Flit insecticide, showcasing a unique collaboration between two well-known brands in the advertising industry.