I want to pay a flat recurring fee and have my fridge be filled with basic food products (e.g. like a hotel's minibar) you chose from 3-5 preset packages out of 3 pricing levels, setup how many people are in the house and you are done
the service will calibrate (with your help) the content of the packages, e.g. if you see you eat more bread than you drink milk and end up with too much milk and too little bread, you can tweak it (larger bread package, smaller milk bottle)
All products will be generically packaged and will have a very low price as this startup will specialize in basic products (bread, milk, eggs, cheese, basic meats, popular fish, soft drinks, water, core vegetables and fruits)
Having a massive buying power, the prices of these basic products will be much, much cheaper than any grocery store
Having statistically well sized packages for most households types will ensure optimal saving and minimal food waste.
you will never need to go grocery shopping again, never need to "remember the milk" throw much less food, and spend so much less on groceries you won't know what to do with the money you have left.
I would start this but it seems it needs a logistics / supply chain pro from a large corporate to be able to pull this through