Developer supply container and developer supplying system

A developer supply container comprising:

• a developer accommodating body, the developer accommodating body being rotatable about a rotational axis;
• developer contained in the developer accommodating body;
• a developer discharging body in fluid communication with the developer accommodating body, the developer discharging body having a discharge opening that is provided in a bottom portion of the developer discharging body, with the discharge opening being configured to discharge the developer from the developer discharging body, and with the developer accommodating body being rotatable relative to the developer discharging body;
• and
• a track provided at each of opposite sides of the developer discharging body, each track being provided below a plane that includes the rotational axis and divides the developer supply container into a lower section that includes the discharge opening and an upper section, each track (i) projecting from a surface, (ii) including a first part that extends from a first position to a second position, with the second position being closer to the plane than the first position, and (iii) including a second part extending from the second position of the first part such that a plane perpendicular to the rotational axis and passing through the second part passes through the discharge opening, with a portion of the surface extending from the first position of the first part in a direction away from the second part.