I have been using the same product since 1989. The Hollister #8590 with the rings.
They discontinued my supplies and changed the product to what they refer to as an upgrade, new and improved.
Well, I still use the rings. The product is awful. The closure on the end is not secure. The plastic is much thinner on the bags, and I can smell stool the same day of placing a new appliance. I believe this is due to the poor quality of the plastic allowing the smell to seep through the plastic, as I can't locate any leaking. This product is an extreme disaster and disappointment, and I really need to find a new company to provide quality products. We all have been through hell! We shouldn't have to put up with another major inconvenience.