Cereal Box
From DT Online
This type of package is most often seen to contain dry foodstuffs such as breakfast cereal, dried fruit, suet etc. The foods are always protected by an inner lining, typically a plastic or grease-proof paper bag.
The package is usually highly decorated with printed material, and is supplied sealed at top and bottom with glue. However, if the top of the package is opened carefully, it can be re-sealed with the tab on one of the flaps.