I'm looking for a connector like Exped uses on the schnozzel pump sack that I could permanently attach to a trash compactor liner. It doesn't have to be that connector specifically, just something similar as long as it can be adapted to the thermarest pad. Even a classic thermarest valve would work if someone has a great idea on how to attach it. Trying to make my trash compactor liner double as a large pump sack at the end of the day (and still be waterproof).

Something like this would be perfect...
20210307_213014.jpg

In order to accomplish this...
20210307_203922.jpg