I have tiles stacked in some awaiting bathroom completions, electrical connections in another, plumbing connections in another, ceiling fan parts, etc. It makes sorting easier.
Also I keep one in the back of the van to keep the water jug from spilling and we always take several camping: one for canned goods, one for pots and pans, etc. and then stack them at the end of the park picnic table to form week-end kitchen cubbies (throw a tarp over them) and each of us get one for a cot-side table in the tent. Oh, and we have one for swim fins, masks, snorkles, sun block, floats and the inflator that plugs into the cigaret lighter. I still need more!