I’ve got a backpack that’s falling apart after less than a year and was looking for a much better one that will hold up well. Specifically, the use case is dragging food home from grocery stores or dragging cards in plastic boxes/board games around at best…
My first year in high school (US) I bought a used “German Mountain Rucksack” from a military surplus catalog. Heavy canvas, rubberized top and bottom, triple stitching, buckles and drawstrings instead of zippers.
I used it all through HS and college, and I’ve taken it on dozens of flights across the country and overseas. I’ll frequently load it up with 40lb of groceries and bike home from the store. It looked like it had gone through a warzone when I got it (and in all probability it has) but even after 20+ years of rough use it’s still going strong - so that’s my vote.
Very durable. I did a two-month bit on the road with one. But so painful to carry when fully loaded, so I was very thankful when someone gave me a modern hiking bag instead.