A box is made by folding a sheet of material. Preferably, the box is formed by applying adhesive and folding using a machine, and a waterproof or water resistant coating is applied so that the box is configured for use as a cooler. The box includes (a) a storage portion, including a bottom panel, a first end panel, a second end panel, a first side panel, and a second side panel; (b) four corner panels; (c) a top panel including tabs; and (d) a latching panel attached to the first side panel and pivotable relative thereto about a fold line, the latching panel including first and second subpanels. The latching panel includes cuts extending between and dividing the first and second subpanels through which the tabs respectively extend when the cooler is in a closed position.