A method and a system are disclosed including a stackable storage container. In various embodiments, the stackable storage container includes stacking locks that may be deployed automatically to lock the stackable storage containers together when a first storage container is placed upon the top of a second storage container. A tri-state locking system is used to lock the containers in a stack configuration. Deep chamfers at bottom surfaces and top lids of storage containers allow automatic alignment of the containers. When storage containers are stacked and aligned, a lock status indicator is activated to indicate the state of the stacking locks. The lock status indicator may also have an added function to allow a user to unlock the stacked storage containers to detach and remove them from the stack. The user may not manually lock the storage containers but the user may unlock them manually.