Lunch boxes

The concept of a food container has existed for a long time, but it wasn't until people began using tobacco tins to haul 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.
Lunch boxes have been manufactured using various materials. Typically, children's school lunch boxes are made of plastic or vinyl, while adult workers' lunch boxes are commonly made of metal, such as tin or aluminium, due to the greater need for durability. The aluminium variant was invented in 1954 by Leo May, a miner in Sudbury, Ontario, after he accidentally crushed his tin lunch box.
Today, lunch boxes are generally made of vinyl, with foam insulation, and an aluminum/vinyl interior. As a result, they’re usually much better at retaining their temperature but are less rigid/protective.