I am so old that… (my kids love this stuff NOT) we didn’t have plastic shopping bags. At all. Not even available. Really. We used metal canteens for water while hiking. Metal (aluminum) cups and plates for camping. Real cutlery. Ketchup came in glass, along with everything else, glass or metal. We backpacked too – just a wee bit of plastic coming onto the market then, for everyday use.
Not suggesting a return to the dark ages (although we’re headed there anyway). Just saying there’s more than one way to skin a cat (or prepare your goulash). But if convenience is the primary goal, plastic it is.