The Gatz JAR
It is the first, finest and only fuel analysis tester capable of separating non-petroleum contaminants and thereby purifying water and debris from contaminated AVGAS and jet fuel.
This 12 or 16 ounce jar is used to test and collect fuel samples during pre-flight inspections. It then separates any co-mingled fuel and water and containments and only allows clean fuel to be poured back into your fuel tanks instead of on the shoreline, ramp or worse of all in the water below your seaplane. It achieves this by a simple filter which traps the water and containments behind it, once you have poured the tested fuel back into your tank you can disgard the trapped water and other containments safely into a rag or on the ground without polluting the soil or water.