So why end a system that works? Maybe because he does not need the Munchkin bags!
The only difference between a basic garbage bag and a bag of the brand is the hard plastic flange for attaching the bag in the trash hole: it suffices once the first bag of the brand used to keep this collar and spend sackcloth trade such high 20 to 30l garbage: little ears of the collar used to jam the bag in trade fasteners, and voila: I have a bag as well as the farm original, at almost no cost.
So I am delighted because I'm not locked into a proprietary system, and I am saving!