A container apparatus for removable attachment is disclosed. The container includes a reception portion having a base and one or more dividing walls configured to separate items within the reception portion, and one or more brackets longitudinally adjustable along the holder, the brackets comprising hooks for selectively clasping ends of the elongated sides. The reception portion comprises integrally formed elongated sides extending from the base and end sides extending between the elongated sides to form an open container. The apparatus is configured to receive items therein allowing efficient exchange of sportsman items when coupled to a tree, tree stand or interior of a boat.