Bioreactor container and integrity check method for bioreactor containers

A bioreactor container (1) comprising:

• an at least locally flexible wall (3) that has a fluid-impermeable inner sheet (5) and an at least locally structured outer sheet (7), the structured outer sheet (7) being configured to separate the fluid-impermeable sheet (5) from an object outside the bioreactor container (1) so that the object from outside the bioreactor container (1) does not come in direct mechanical contact with the fluid-impermeable inner sheet (5) and so that a leak in the fluid-impermeable inner sheet (5) cannot be sealed by the object;
• and
• at least one container opening (9a, 9b, 9c, 9d) that is enclosed in a first state by the outer sheet (7), and that is freely accessible in a second state, wherein:
• the bioreactor container (1) can be converted from the first state to the second state by local tearing and removal of the outer sheet (7).