Only an anecdote but: I have two "bag for life" bags from Marks & Spencers in the UK that are no longer sold, which is a shame, because they pack up into a tin

Only an anecdote but: I have two "bag for life" bags from Marks & Spencers in the UK that are no longer sold, which is a shame, because they pack up into a tiny little pouch that can go in a jeans pocket; ideal for a guy who doesn't carry a shoulder bag all the time. They are 15 years old (at least) and were made from some sort of recycled nylon, I think. I've probably used them for a thousand shopping trips, and as I shop on foot, all of those journeys have involved carrying said shopping about half a mile. I don't know how long it took me to fully switch over (i.e. remember to pack it each time I left). I am easily distracted, so maybe it took the first 50. But this is of the order of two thousand single use plastic bags not used. I refuse to believe the manufacture of this bag didn't break even by 250 single-use bags. I reckon they will last another couple of years at least (one of them is kind of worn; I balance my shopping weight a bit better now). Won't last as long as my wallet, which is forty this year, or my shoulder bag, which is 25 next year.