Triangular gimbap

Triangular gimbap ( is a kind of gimbap. It is made from steamed white rice (bap) and various other ingredients. It is wrapped by gim (sheets of dried laver seaweed) in a triangle shape. The plastic wrapping is folded between the gim and rice. People can make it by themselves but usually they purchase it at a convenience store. They tend to eat it to replace their meals. A refrigerator shelf life is within 1 day. Convenience stores have various kinds of triangular gimbap. The price range is from 700 won to 900 won.
History.
Triangular gimbap was first made in Japan. At first, the name was Onigiri. It was ball-shaped and made to serve quick meals during war. Triangular gimbap was introduced to Korea during the 1990s. In 1991, 7-Eleven began to sell it. Family Mart and GS25 followed it. Nowadays, there are various flavors and types of triangular gimbap: tuna with mayonnaise, Jeonju bibimbap, bulgogi, spicy tuna, cheese spicy chicken, and so on. 
Flaws.
Triangular gimbap is very convenient. It is easy to replace meals with it. However, it has a few side effects that are harmful to people's health. The amount of sodium and fat it contains is near the Daily Reference Value. The nutrients it contains are 20~30% of the amount a person needs to take a day. Also, synthetic preservative was found. It was revealed that several food additives are added to it because the main resource, rice, is at least 2-3 years old and manufacturers added artificial flavor enhancer to remove rice smell and bleach to make the rice whiter.