Provided are animal containment systems and components, including single-use animal containment cages and modular rack units. Load conditions change dynamically and for this reason load balancing tends to also be dynamic. User community information such as links to wiki topics and forum threads are contextually provided for and inline with individual error log entries. The peak power consumptions for the set of all possible segments for each time instant are added to determine a total peak power consumption for each time instant, and a particular path is selected as a schedule to operate the bank of elevator cars, if the total peak power consumption for any instant in time while operating according to the selected schedule is below a predetermined threshold. A shipping container bag that is light weight, strong, made of a fire retardant material and which forms an ultra violet light, weather and dust barrier can be used to store the shipping container.