Why sustainable products fail—and what actually gets people to use them

Here’s a story you’re probably familiar with: You buy the reusable coffee cup. It’s beautiful, ethical, made from recycled ocean plastic, and you feel good about your purchase. But then it leaks in your bag, ruins a notebook, and by week two it’s sitting in a cabinet while you’re back to disposable cups and a vague sense of guilt. Or maybe it’s the “eco mode” on your washing machine that takes three hours instead of one. The sustainable packaging that requires scissors, sweat, and a...