McDouble

The McDouble is a hamburger sold by the fast-food restaurant chain McDonald's. It was introduced in 1997, but was discontinued until 2008. It is one of the cheapest products sold by the company.
Description.
The burger contains 390 calories, 23g, 7% of fiber and 20% of daily calcium.
The price of the burger depends on their size and at the company, with the price sometimes ranging to $2.99 it is also the cheapest way to buy a burger similar to the Big Mac, and was also referred to as a lifehack, as the burger is half the size of a Big Mac.
History.
The burger was introduced in 1997, and was being advertised with "Eddie the Echo", at which point the McDouble did not have cheese yet and was garnished with lettuce and tomatoes.
The bacon McDouble was introduced and costs $2. This sandwich was also added to the U.S. "Dollar Menu & More" in November 2013.
According to the New York Post, people would purchase the Mcdouble rather than buying the Big Mac.
People on social media, including some radio announcers, claimed that the Mcdouble was the cheapest and most nutritious food, and it was also claimed to be the cheapest alternative to junk foods.
The product was ranked by The Business Insider as top 1.