Container class is one of the classes that were put into class libraries. To handle objects that contain other objects, container classes are used. A GUI class library contains a group of container classes.

Containers of pointers provide containers to hold the objects that are heap-allocated in manner that is exception-safe and with minimum overhead. The central idea is to make OOP easier in C++. This is done by establishing a standard a set of classes, methods to deal with OO specific problems.