So all there is to say about Containers is this ?
When you create/spawn a "contained" object, the system will automatically create the other *contained* objects to complete the original container.
How ever the creating is done, in the layout or by events.
When you destroy one *contained* object, all *contained* objects will be destroyed.
Shortly said: the system will always complete a container by creating the missing objects, but when the "incompleteness" is created by a destroy event, the whole container is destroyed.
And not like i read in other posts, every event you apply to a contained object will be applyd to all objects in the container. (wich would be heaven)