assembled state the hollow body 5 is ready for its intended use no further repositioning of the top section 10 of the hollow body 5 relative to the bottom section 15 of the hollow body 5 is needed a plurality of latch mechanisms 25 are preferably provided and used to increase the integrity of the hollow body 5 in its closed or u201c sealed u201d state i e to maximize accurate engagement and minimize the risk of collapse or deformation of the hollow body 5 due to external stress resulting in partial or total separation of the top section 10 from the bottom section 15 or other u201c failure u201d of the body 39 s void making purpose in certain applications in certain applications such as forming voids in concrete it is unlikely that the assembled ball or body will ever need to be u201c opened u201d accordingly securing the top section 10 of the hollow body 5 to the bottom section 15 of the hollow body 5 is of primary importance and the ability to u201c unsecure u201d or open the latch mechanism s 25 is moot undesirable and or irrelevant persons of ordinary skill in the art will understand that any suitable latch may be utilized within the scope of the invention in this regard and by way of example even if just a single latch element 25 is provided on the hollow body the sealing or further securing of the top section 10 of the hollow body 5 to the bottom section 15 of the hollow body 5 along the periphery 40 may be further aided or facilitated in any number of ways.