Takeaway lunch boxes are generally round, and most of them will be printed with brand names or other information. If the lunch box is round, then this information will be printed on the side of the box, which is not easy to see.
In order to make it easier for customers to see the brand name, the designer of the lunch box usually cuts a small piece from a corner of the box, so that there will be a prominent corner on the front of the box, on which the brand name or other information can be printed. In this way, customers can easily see the brand name, and it is also convenient for them to identify and distinguish different takeaway lunch boxes through the brand name.