The "forever bags" are the UPS-owned vinyl bags that we use to sort smaller packages into. These are different from the USPS-owned bags used for SurePost.
They're called "forever bags" because they can be reused indefinitely. But not forever. UPS use to make a big deal about them being designed & manufactured by a firm in Georgia, similar to our uniforms. Now they've been made in China (also same as our uniforms) for quite some time, so clearly they're not forever. I guess UPS should call them "one-year bags" or however long they last.
We call them "forever bags" here because they stay in our building forever. We fill about at least two dozen bins (usually more) everyday but only send out half that amount. We're required to send them out in packages (label ripped off, ten per package) and because it costs hours, nobody wants to take credit for the time. Thus, we usually keep them around forever until CACH gets desperate, then we fill up a pair of 53' trailers full of them to CACH. I'd really hate to be the person unloading that trailer... (Just to give an idea of how this works: we've probably got about the equivalent of a hundred bins or more of these bags sitting around; meanwhile, another hub sends us garbage bags that get tossed after one use because they don't have enough. UPS is saving money... somehow... probably with some manipulation.)