lunch box, also referred to as a lunch pail or lunch kit,
is a rigid container used for carrying food. The essential
idea of a food container has been around for a very long time,
but it wasn't until the 20th century that they became a staple
of western youth, and in turn, a marketable product in the
eyes of the manufacturers.
The lunch box is most often used by school children, to carry
a prepared meal to school. The most common form resembles
a small plastic briefcase, often printed with a colourful
image that is frequently based children's television or films.
Technically speaking, lunch box manufacturers in some countries
referred to lunch boxes, as we know them, by their actual
name, lunch kits. A lunch kit is the actual "box."
Many lunch kits also were paired with matching vacuum bottles,
usually lithographed with the theme of the lunch kit. However,
pop culture has embraced the term lunch box, so this is what
is generally used.