I doubt they are a warranty item. They, along with the Dewalt equivalents were selling for about $5-$10 at the Jefferson swap meet in late December. Vendor had piles of them, which pretty much sold out by noon Friday.
I like toolbags, the best I’ve found for reasonable money are the Husky branded ones at HD. The material is thicker than the Milwaukee ones that come with tool kits. I use them for ratchet straps, tow straps, truck tools, etc.
What was wrong with the Packout bag? If its something you suspect as a manufacturer defect, you have the right as a consumer to raise a complaint with the company and get it resolved.