What is Iceberg Lettuce? Iceberg lettuce is one of the most popular types of round, compact lettuce, known worldwide as Iceberg Lettuce. Its leaves are light green, crisp, and juicy. Due to its unique texture and long shelf life, it is highly favored. The name “Iceberg” originates from the old method of transporting produce with ice, which kept it fresh and flavorful until it reached the consumer—much like the …