Kathon is a highly irritating preservative and powerful allergen. Even though not required by law, Dulcop does not use this harmful chemical in our products. For us, safety and concern for our customers always comes first. Unfortunately, other bubble manufacturers still use kathon to kill bacteria. A wide-body aircraft is a large airliner with two passenger aisles, also known as a twin-aisle aircraft. As the world's first wide-body aircraft, the Boeing 747, also referred to as a jumbo jet, revolutionized international travel around the globe by making non-stop and long distance travel accessible for all.