I just came across this video. Interesting idea, basically uses jars with different cleaners submerged in plain water rather than filling the container with solution. On a full shop job I don't mind using a full tub of solution, I probably run 7 or 8 batches. At that point I've gotten my moneys worth and it's wasted anyway. This might be good for small batches, or when you want to clean something super dirty and not ruin the full tub of solution.