We'll be offering these very soon, almost infinitely re-useable. H2out just won an Innovation award:
http://www.h2out.com/products/h2out-sd
Reusable? Do you really believe you can bake a diesel or gasoline impregnated filter in you home oven and live to post again? The wife will have your head on a plate and you'll have earned it! An insudtrial oven, sure (with safety concerns), but not in the kitchen.
As a practical matter, these have been manufactured by numerous vendors for use on air compressors and hydraulic system, not to mention high-purity chemical tanks, for at least 30 years. I've spected them out.
But I do see value here, once they get the price down below $50/year or so.