Complex cap and culture container assembly using same

A culture container assembly comprising:

• a bottle body having a mouth portion and a neck portion;
• and
• a complex cap comprising:
• a coupling element having a first coupling part to be coupled with said neck portion of said bottle body, a recess formed in said first coupling part, and a first opening is formed in a bottom of said recess, wherein said first opening is communicated with said mouth portion of said bottle body when said first coupling part is coupled with said neck portion of said bottle body;
• a shielding element for at least partially sheltering said first opening of said coupling element and comprising a second coupling part to be tight-fitted into said recess of said coupling element;
• and
• at least one filtering element mounted in said recess of said coupling element and arranged between said coupling element and said shielding element for filtering off external contaminants and controlling gas-permeable amount.

A culture container assembly comprising:

• a bottle body having a mouth portion and a neck portion;
• and
• a complex cap comprising:
• a coupling element having a first coupling part to be coupled with said neck portion of said bottle body, a recess formed in said first coupling part, and a first opening is formed in a bottom of said recess, wherein said first opening is communicated with said mouth portion of said bottle body when said first coupling part is coupled with said neck portion of said bottle body;
• a plurality of shielding elements for at least partially sheltering said first opening of said coupling element, each of said shielding elements comprising a second coupling part to be tight-fitted into said recess of said coupling element, wherein said shielding elements comprises at least first and second shielding elements having different sizes of second openings, and one of said first and second shielding elements are replaceable with the other one;
• and
• at least one filtering element mounted in said recess of said coupling element and arranged between said coupling element and said shielding element for filtering off external contaminants and controlling gas-permeable amount.