Pack made from board or a similar material

Pack, made from board material, for packaging a number of objects each having a top with a rim and a base and shaped so that when the rims of the tops are in contact the bases of adjacent objects will be separated to leave a cavity between the adjacent objects, said pack comprising a wrap around sleeve including a base panel, said sleeve including a locking element having one flap die cut from said base panel, said flap having a central section connected to said base panel by a first fold line and having a dimension that is at least approximately the width of the cavity and a selected height measured along a line extending perpendicular to said first fold line, said flap further including two side sections disposed on opposite sides of said central section and connected thereto along second and third fold lines, respectively, said second and third fold lines each forming an angle with said first fold line no greater than approximately 90.degree., each said side section having a length which is greater than said selected height of said central section.