A store-to-kitchen cart. I carry it in store, checkout items from within the cart - mos t current carts are clunky, heavy - one that you can push onto your car trunk and carry out into your pantry/kitchen. Basically the iPod of shopping carts. Would save billion of shopping bags, no more "paper or plastic?"
It doesn't let you check out from within the cart itself (is that really necessary? If that is what you need, why not just create an app like the Apple Store has?), but it does let you use the same cart both in and outside the store. I bought mine since it makes it a lot easier to walk my groceries home.
I too have used that, but it's clunky & unwieldy. Need something more senior-friendly, better ergonomics e.g. something that folds up into your car trunk like a stretcher for ambulances. Make it fashionable to bring your cart to store.
Hahaha, I love it. I had this exact idea this morning! Never expected to see it posted, and so soon after. Great minds... ;)
Was thinking more along the lines of direct to fridge and freezer options. Ideally with cooling or refrigeration properties so cold food can stay cool on the ride home, and the whole thing can pop into the fridge.
In Europe (I think Amsterdam?), beer bottles are often sold in plastic cartons that are then refunded when returned and reused. Could be handled like that.