Why do all these old cat ladies have to spend taxi money to buy kitty litter? Why not sign them up for a subscription service and deliver it to their door? There is no need to make trips to the grocery story for items that never change - there are no decisions to be made. Here we can draw the line between regular commodity purchases and impulse buys. Subscriptions can be handled in a 'Just-in-time' logistics model to avoid investment in new equipment. Rent a U-Haul just for the day my neighbours want their food delivered and empty it the same day. Eventually, the friendly neighbourhood fashion consultant will choose clothes from the internet, delivered in the same U-Haul. In this way, we can turn Walmart into a convenience store.