  Physical properties of materials are seldom studied in the context of packing
problems. In this work we study the behavior of semifluids: materials with
particular characteristics, that share properties both with solids and with
fluids. We describe the importance of some specific semifluids in an industrial
context, and propose methods for tackling the problem of packing them, taking
into account several practical requirements and physical constraints. Although
the focus of this paper is on the computation of practical solutions, it also
uncovers interesting mathematical properties of this problem, which
differentiate it from other packing problems.
