Bottle end, mixing container having the bottle end, and method for manufacturing the mixing bottle

A mixing container comprising:

• a holding body having a holding space formed therein, an outlet formed in an upper part thereof, and a fastening portion formed around the outlet, the holding body being open at a lower part thereof;
• and
• a bottle end configured to couple with the holding body such that the open lower part of the holding body is covered,
• wherein a connecting portion is formed protruding towards the holding space from a middle portion of the bottle end,
• an inlet hole is formed in the connecting portion, the inlet hole having an inner perimeter shaped in correspondence to the fastening portion to receive the outlet as it is inserted upwards from a downward position and fastened, and
• a sealing membrane configured to close the inlet hole is formed on an upper end of the connecting portion.