Geez, Jim - you are strongly implying that one must take responsibility for one's actions. What an outmoded concept in today's environment!

I guess the problem is that if one is refilling canisters they have crossed the bright line drawn in the sand by lawyers, and boldly violated the words printed on the canister: WARNING; DO NOT REFILL. Even if it isn't really valid, refilling does leave you hanging out on a limb.

From a more realistic technical perspective, I am just a wee bit cautious about refilling a container that is designed, manufactured, and marketed, as well as plainly labelled, as a single use device. Your experience is quite interesting, but I am going to have to take a bit of time to get my head around the concept. And then I still have to deal with the basic ease of buy, use, and toss (well, recycle), and staying firmly within the lines....