are largest at their upper extremities and are angularly disposed to each other so as to produce opposing locking forces it is understood by one skilled in the art that these tapers can be disposed at any convenient angle and any convenient number of tapers can be utilized in the preferred aspects of this invention two tapers are utilized one taper being in the approximate plane of the primary panel while the other taper is in the approximate plane of the secondary panel referring to fig1 to 3 which illustrates the preferred embodiment of a primary panel 2 for use in this invention it can be seen that primary panel 2 incorporates a main body section 4 opposite sides of primary panel 2 incorporate female apertures 3 and 5 for purposes of this description the left side of primary panel 2 will be described only although it is understood and clearly illustrated that both the left and right side of primary panel 2 incorporate similar female apertures female aperture 3 being defined by an l shaped projection 10 and a triangular projection 6 triangular projection 6 is a right triangle having sides 22 26 and 30 for purposes of describing the relation of the various component parts of the primary and secondary panels the inner surface of said panels is defined as that surface which would face the center of the resulting pallet container in describing the position of various tapered surfaces as are an integral part of the primary and secondary panels the terms inner and outer are used in relation to the vertical center line of said.