In Bangkok, I came across these nostalgic Tiffin carriers also known as pinto in Thai. It is a series of stacked stainless steel or cream-coloured tin containers. They are the forerunners of modern plastic containers. They can be used to carry a few side dishes to go with a staple, which is rice or noodle, separately. By the time one is ready for lunch, the rice will not be soggy.
It was an invention for a time when people did not have the purchasing ability for outside food, and often brought their own homecooked meals to work. But nowadays they come in all sorts of colour and with more advanced materials like microwavable plastics or enamels. Still, there is no denying its inherent vintage vibe, and many restaurants employ these to serve their dishes.