From Halopedia, the Halo wiki
COBB Industries is a human commercial enterprise. COBB Industries equipment containers could be found in the exterior shipping areas and hangar bays of the UNSC orbital defense platform Cairo during the opening stages of the Battle of Earth on October 20, 2552. COBB Industries containers were also seen in various areas around the New and Old sections of Mombasa as well as the industrial town of Voi in the East African Protectorate.
A COBB Industries container can be seen hanging from a crane in the roof in the Halo 3 levels The Storm and Floodgate. It is the only mention of COBB Industries in Halo 3; all other crates and containers in the game have "Traxus Heavy Industries" printed on them instead.
List of appearances