After installing the bags, they are stuck onto the protruding spikes. You can also edit the design, remove the spikes, and simply press the bags against the basket with a clip.

the clip was designed for a 260 liter waste bin

Once installed, you don't have to take it off when emptying the bin, the bag will empty itself

how to print with PETG because it is more flexible than, for example, ABS, it is important when installing