No, you misunderstand me, perhaps I wasn't clear or maybe you are combing two separate topics in this thread. The plastic kegs I posted are reusable kegs made to withstand the same riggers as stainless. They are not disposable. Actually they have been in use in breweries for a few years now and they are just now starting to get them to work "leak free". There are some people who think that these plastic kegs are what are going to become the replacement for stainless. Much cheaper and much less likely to be stolen. My only reason to include this snippet in a "won't be long" thread.
I hadn't heard of the disposable kegs before this thread. I currently don't own any disposable kegs and have no immediate plans to own any, but I am interested in looking into them.