I had a simplehuman can that had a plastic ring that lifted and then came down around the liner to hold it in place. I could use generic liners and even empty bags from my wood pellets as trash bags.

With this can, there is no ring holding the bag, and so it's harder to use non-simplehuman liners as you have to tuck the excess down the sides of the inner can, a challenge to do. I don't love this "feature".