Developer supply container and developer supplying system

A developer supply container comprising:

• a developer accommodating portion accommodating developer;
• a developer discharging portion in fluid communication with the developer accommodating portion, with the developer accommodating portion being rotatable about a rotational axis and relative to the developer discharging portion, and with the developer discharging portion being provided with a developer discharge opening configured to permit discharging of the developer to outside of the developer supply container;
• a lifter including a receiving support portion, the receiving support portion being provided such that, when the developer supply container is oriented with the developer discharge opening positioned at a bottom side of the developer discharging portion, the receiving support portion is positioned below a horizontal plane that includes the rotational axis, with the lifter being slidable relative to the developer discharging portion between a first position and a second position, with the receiving support portion being closer to the horizontal plane when the lifter is at the second position than the receiving support portion is to the horizontal plane when the lifter is at the first position, and with the receiving support portion being closer to the developer accommodating portion in a direction of the rotational axis when the lifter is at the second position than the receiving support portion is to the developer accommodating portion in the direction of the rotational axis when the lifter is at the first position.