The aluminium foil did not exist as a consumer product a few decades ago. Instead, everyone used tin foil. But it was not affordable to most people because tin foil was quite expensive as compared to the modern aluminium foils. To understand how expensive tin foils were, a fifty-foot roll of tin foil sheet cost hundreds of US dollars. For this reason, only affluent people could afford them. Real tin foils, therefore, faded in popularity after the coming of aluminium foils. But these days tin foil and aluminium foil are used to mean the same thing.