The "AirType Line" for microwave has a new lid with a pressure compensation valve that facilitates heating in the microwave. The valve helps to release the pressure in the container, which emerges during the heating process, thus the lid can be also used in the microwave. Especially for dishes with a fluid content, the lid prevents microwaves from being flushed. An additional function of the Air Type line is the innovative clip system. The clip can be marked with a pencil to mark the cans. The marking can be easily erased afterwards again.