Fun fact: The #Rambo lunch box, manufactured by Thermos in 1985 marked the end of the metal lunchbox era in the U.S. before safety and economic concerns caused manufacturers to switch to plastic alternatives.

"This marked the end of the metal lunchbox era, primarily due to concerns from parents and school officials about safety. Metal lunchboxes were often used as weapons by children, leading to worries about potential injuries from their hard edges".

As a result, manufacturers transitioned to plastic lunchboxes, which were cheaper and considered safer.