Abstract: A carrier includes a main unit and an insert unit. The main unit defines a carrying space having a closed bottom and four sides, one of which has an opening therethrough large enough to permit an animal to enter the space through the opening. The insert unit has a closed top, four sides, and an open bottom. After the animal has entered the main unit, the insert unit is lowered down into the main unit to close off the side opening. Then a foldable top closure for the main unit is folded to secure the carrier and form a handle structure for carrying the carrier. Both units are foldable and are structured to provide an enhanced strength carrier. Strength enhancing features include the foldable bottom of the main unit, double and triple thickness portions of the top closure, and the presence of the insert unit in the main unit.

Abstract: Reusable modular display units constructed from corrugated board are disclosed, the units transportable in knock down form. The units can be assembled and interlocked together to form a modular display for advertising products and services. The units are preferably of trapezoidal design and interlock with units of similar design and construction in side-by-side, end-to-end or side-to-end relation.