Hi,
I have a crinkle cat tunnel. It's fabric but has a layer in that makes a crinkly noise like a plastic carrier bag. It comes as a tunnel but there is velcro so you can make it into a bag if you want. The mouth of the tunnel is stiffened and stays open.
Anyone want it? My cat's barely glanced at it from day one and it's sitting alone and unloved in the dining room at the moment. I'd rather it went where it was wanted.
PM me if it sounds like your cats kinda thing and I'll send it off