https://www.amazon.ca/Weston-30-101-...de%2Bbags&th=1
Would something like this plus clips work for most typical sous vide~ing? I was also thinking I'd put the freezer bag inside one of these (reused) typically as a back up for seam failure. The water pushes out the air, so it's really just double bagging.
$35 seems a bit pricey though, but those are good sized bags.