A lunch box, spelled lunchbox in almost all UK and US dictionaries, also referred to as a lunch pail or lunch kit, is used to store food to be taken anywhere. The concept of a food container has existed for a long time, but it was not until people began using tobacco tins to carry meals in the early 20th century, followed by the use of lithographed images on metal, that the containers became a staple of youth, and a marketable product.
The lunch box has most often been used by schoolchildren to take packed lunches, or a snack, from home to school. The most common modern form is a small case with a clasp and handle, often printed with a colorful image that can either be generic or based on children's television shows or films. Use of lithographed metal to produce lunch boxes in the 1950s, 1960s, 1970s and 1980s gave way in the 1990s to use of injection-molded plastic.
A lunch kit comprises the actual "box" and a matching vacuum bottle. However, pop culture has more often embraced the singular term lunch box, which is now most commonly used.
Today, lunch boxes are generally made of plastic, with foam insulation, and an aluminium/vinyl interior. As a result, they are usually much better at retaining their temperature but are less rigid/protective. However, metal lunch boxes are still produced, just not as popular as they were in the 1960 through 1980's. Some of the lunch box made from wood, or plastic with stainless steel inside. the cost of lunch box range from S$10 to S$30, which depends on which material to use.