Abstract: An apparatus for holding a fumigant container has a sleeve with an interior volume, a first fastener affixed to the sleeve adjacent an end of the sleeve and extending outwardly therefrom, and a second fastener affixed to the sleeve adjacent the opposite end thereof. The first and second fasteners are suitable for removably affixing to at least an exterior surface, such as a pair of rails of a hopper car. Each of the fasteners includes a clip and a strap affixed to the clip. The clip includes a body formed of a polymeric material and having an aperture formed therethrough and an arm having one end integrally formed at the body and extending into the aperture such that the arm is flexible in relation of the body. The sleeve has at least one surface formed of a gas-permeable material. One end of the sleeve is open so as to allow for the introduction of a fumigant container into the interior of the sleeve.