I was looking sadly at the bag of rubbish in my van, surprised at how much we're still accumulating and started thinking to myself that I wish there was a way to just take a container to supermarkets and have it filled up instead of having to buy a new bottle/jar, etc.
So then I wondered - why can't supermarkets have a space where you take your empty plastic/glass container or whatever and you just refill your olive oil/veg oil/sunflower oil from a little tap? It's something they could maybe have by the "deli" section. It would be great to have this option for people who buy containers/bottles of water as well, although I'm not sure if supermarkets would claim that this wasn't possible due to "health & safety" reasons of having to keep the water sealed in individual containers? It could maybe also extend to vinegars, cordials/squash.
Additionally, there's not reason why grains couldn't also be bought without the packaging and just weighed into small bags, say (a bit like you do on the fruit/veg section). The weigh bags could be hessian and reusable.
Supermarkets are probably a long way off the latter and I guess a lot people in this day and age are all about convenience so they want to get in, get their shopping done quickly and get out, rather than mess about with measurements and remembering to bring your container, and then there's people who just shop online anyway.
But what do you think? Would you be happy to take refillable containers to supermarkets? If anyone was going to take it up, I'm imagine Waitrose would be the most likely candidate but then maybe others would follow suit.