Maybe I'm just old, but when I was a boy, the PB&J sandwiches packed in my lunch for school didn't come in ziplocs. They were just plain ol' baggies. One of the rights of passage in elementary, was getting in trouble with the lunchroom monitor for blowing up the baggie and popping it. Great fun. Fast forward to present day.
I was intrigued by the Schnozzle idea, and using it as a pack liner. That might be great, but it's huge, which is the main drawback I have with garbage disposal bags. For my GG Murmur, I made a simple custom size bag out of polycryo that's just right, and I've been trying to think of a way of incorporating a stem to fit my NeoAir valve, a kind of MYOG Schnozzle setup. Then it dawnwd on me.
I puffed up the bag, wrapped my finger and thumb around the mouth as if I were going to blow it up like a sandwich baggie, and stuck the NeoAir nozzle in the hole instead. Squeezed the bag and after 3 times the Neo Small was completely filled. Sure, the small is, well, small, but so is the Murmur, so the bag isn't that big either.
Maybe this is old news, but I haven't seen it before and I was pretty excited at its simplicity. I don't see why this wouldn't work for any pack liner bag and Therma with a nozzle. It did take a bit of fiddling the first try to find good placement of my hand and nozzle with all the bunching of the bag, but it was an easy curve to learn.