One aspect relates to a container for inserting into a holding device, comprising: a wall that is flexible at least in some areas, which wall is squashed, at least in some areas, in a transport condition in a direction opposite to a stretching direction; a handling unit connected to the wall, which is designed to come into engagement with a complementary handling unit of a transport device; a securing unit which in a transport condition hinders stretching of the wall of the bioreactor container along the stretching direction, wherein the container can, when the securing unit is released, be extended at least in some areas along the stretching direction, as well as a transport device, a use and a method.