-Safe water & food storage
Most people take lunch to work in plastic containers, and often in plastic bags. Pure plastic is rather fragile — it cracks in the light and melts when heated. Added stabilizing substances make it stronger, yet more toxic. That is why plastic bags and tableware are blamed as unsafe.
Carrying and storing food in briefcases and bags is unsafe.
Hiking and traveling make keeping food safe a relevant issue.
Night shift workers. Yet, night shifts make it possible to take care of lunch in advance.