Yeah, the birds diapers take panty liners. So you just snip one of those in half and one goes in each. Drop that in the trash every time and you're good to go.
They go around front of the wings - so you have to pull their wings through it and their feet have to go in as well. So feet first, wrap around, pull wings through.
They weren't clipped at first but we found that they were injuring themselves and damaging things in the house so eventually we clipped. Now they walk around the house like any other pet (and flap their wings, but don't really go anywhere). They love standing on doors, computer monitors, and we have a gym set for them above their cage.
They're a lot more tame when you clip the wings (not as fright/flighty). But you have to be really careful to clip it right or you can cause bleeding. (I grew up breeding birds).