Arm and hammer diaper bags! Not like a diaper bag bag but they’re small little dirty diaper bags that you can tie your poopy diapers in and they are scented! Have a little container to clip onto your diaper bag so if you’re ever somewhere that you can’t throw it away you can tie it up and put it in the diaper bag!
I’m not sure it’s a hack/gadget but My daughter was like Houdini in her swaddlers. Finally found a zip up one and it was amazing. They are hard to find!