ZeroTag is a platform for conscious consumption powered by digital product labels for sustainable shopping. The platform is made up of three main elements: a tag, an e-label, and an app. The tag is a QR code sticker that consumers can stick onto any reusable container that when scanned shows product details of whatever is inside. The e-label can be changed when the container is refilled. When users have a profile with ZeroTag, e-labels will warn users if a product does not match their dietary preferences. The app is a food planner and tracker for mindful eating. It features an e-pantry, recipes, and a shopping list. Users can see what are in their tagged containers, and they can add recipes to their shopping list. The shopping list automatically crosses out items in their e-pantry, and suggests retailers where they can bring their own containers to buy the remaining items.