In Switzerland there is a service called Twint, basically an app to send money to a phone number or to scan a qr code to pay. It is very popular at farmer's markets, but also works on any payment terminal, since the terminal shows a qr code on the small display. The money can be charged to a card if you want, but also directly withdrawn from your bank account. So in this last version, Twint allows to pay electronically without using Mastercard or visa. I have always wondered why such a system was able to arise in small Switzerland and there is nothing similar in any other European country as far as I know.

Mines are quiite heavy, you would need some big ass drones. And usually mines are hid under a layer of soil, just having them lie around would make it very easy to dispose of them.

In the linked video they claim the powder washes better (in addition to the environmental benefits) even at 30°. Also the cardboard boxes for milk DO have a plastic lining, but it's not secret. Otherwise the liquid would destroy the cardboard. But this is OK I think, it gets collected and partially recycled. The "bad" microplastics are inside the liquid detergent itself, to ensure that soap and water remain well uniformly mixed.