This is a traditional style of counter display most commonly used for snacks. All four corners are glued for fast set up. The top lid folds back to form a pop up header and can be diecut to form different display shapes from squares to arches.
This styles needs to be folded during assembly. The sides are 3 layers thick for strong structural support. This style of tray is used for smaller runs and normally have separate inserts added for test kits.
A double glued side wall simplex tray is a great alternative to the more expensive set up box when used with a telescoping lid. These trays are normally used with chipboard material and are easy to print and assemble.