Not sure from your posts if you're trying to stop odors from trash/bucket pottie or food odors from attracting bears!
The 'odor proof bags' google search turns up more small baggies for odor proofing cannabis than anything else but those are small...too small for much except what they were designed for...
And some of the reviews say that they don't work well enough to keep canine sniffing dogs away so they sure won't work for bears!!
For bear country, IIWM and I was in the van, I'd just keep a really clean campsite and make sure that food is out of sight. This means NOT throwing dish water on the ground, putting away all food at all times and not leaving even a speck of garbage around including putting cans and leftover food in a fire pit...all no no's. Bears in heavily tourist areas learn what a cooler looks like and WILL tear open a
car door when they spot one so it's not only go to be put away, it's got to be out of sight.
Unless a bear is habituated, they are more afraid of you than you are of them!
I do take special bear precautions if I'm out on a canoe/hiking trip. Then we hang our food bags but we're all using dehydrated foods at that point and don't have a full kitchen to worry about. I do own a BearVault for the times I want to go solo cause I throw worse than a girl....
if you're trying to cut down on garbage odor, there's a couple of solutions - to cut down on the amount of garbage, get rid of any excess packaging in the parking lot of the grocery store if you must buy things that have multiple packages. Burn any cardboard packaging in the fire as well as paper towels, tissue etc. Crush any cans that can be crushed. Pack the garbage in tight and be a good neighbor, if anyone is going to town, share the trash detail.
If it's bucket pottie odors, well that's where I start preaching about the separating toilets....