Ink replenishment system

An ink replenishment system comprising:

• an ink replenishment container;
• and
• a printer in which ink is replenished to an ink storage portion from the ink replenishment container via an ink introduction member, wherein
• the ink replenishment container includes
• an ink accommodating portion configured to accommodate the ink,
• an ink outlet portion that is in fluid communication with the ink accommodating portion, and
• a valve disposed inside the ink outlet portion, the valve being closed by being biased in a first direction from the ink accommodating portion toward the ink outlet portion by an elastic member, the valve being opened by being pushed in a second direction opposite to the first direction against the bias by the ink introduction member that is coupled to the ink outlet portion,
• the printer includes an ink inlet portion at a tip end of the ink introduction member,
• the printer includes a sealing cap mounted from a tip end side of the ink introduction member,
• the sealing cap includes a first seal portion that seals the ink introduction member from an outside of the printer at a first seal position in a state in which the sealing cap is mounted on the ink introduction member,
• the ink outlet portion of the ink replenishment container includes a second seal portion that seals the ink introduction member from the outside at a second seal position of the ink introduction member in a state in which the ink outlet portion is coupled to the ink introduction member, and
• a first sealing region from the tip end of the ink introduction member to the first seal position includes a second sealing region from the tip end of the ink introduction member to the second seal position.