Containers can be exchanged between container holders and container shuttles using an inventory conveyance system within a workspace. The container holders are configured to hold one or more containers having consolidated inventory items in high density storage. The container shuttles are also configured to hold one or more containers for performing other operations with respect to inventory items in the one or more containers. The containers are configured to hold inventory items while the inventory items move for various operations throughout the workspace and while the inventory items are stowed in high density storage in the workspace.