Download the app, enter using your personal QR code as a key, shop, and pay at the self-service check out. This is how simple shopping is in the VOI Cubes, which have 18 m2 of retail space worth of food on sale. VOI Cubes are air-conditioned using CTA split air conditioning units. This pilot project from the Migros Aare cooperative is currently in the testing phase and is constantly being refined based on customer feedback.