Maybe it’s just what I call them, but I’m referring to the little flexible “thingies” that are used for “Snap Together” items. A good example is the “Snap and Store Box” that we can print from the app.
I also used them to make a Bluetooth speaker box here.
This is what I’m talking about. It was my first successful prototype when I learning how they work. It’s a crude example, but… there it is.