Here is a recording of someone crumbling, tearing, and stomping on a plastic bag. You can use it for any video, podcast, or song and it would be nice if you gave credit to me (although it is not required).
Sound clip of me at home "zipping up" a pencil bag, slowed down 31% and noise reduction applied. Recorded with conexant smart audio and at2020 usb microphone, processed with audacity.
Sounds of inside a bag, next to other light materials and a mostly filled metal water-bottle that makes 'boing' sounds because of the forces exerted on the bag from walking actions.
A leather bag being dropped and picked up several times. Recorded in stereo on a tascam dr-05. Raw audio with a 6db 5000hz low pass filter, and a 6db 100hz high pass filter.