File created by 3ds Max, a software package used for 3D modeling and animation; stores a collection of 3D objects, including their properties; allows modelers to organize scene objects into groups; also allows object groups to be shared.

Containers can either be used as a source, meaning that the objects are only referenced by the scene, or they can be used as a local copy, which means that changes to the objects will be saved to the container. To create a Container, select objects in a scene and then choose Tools → Containers → Create Container From Selection.