This is a water bottle commemorating the direct operation between Tokyu and Sotetsu lines. It features designs of vehicles from multiple railway companies. Logos and vehicles of Tokyu, Tobu, Seibu, Metro, Keikyu, Sotetsu, and Keisei are depicted. The text "祝 600回 営業制度研究会 1960.3.1-2019.2.14" (Celebration of the 600th Business System Study Group 1960.3.1-2019.2.14) and "Collegium Railway Operations Regulation" are included. This is a collector's item for railway fans. It has been opened and stored at home, so please refrain from purchasing if you are sensitive to such things.