The company announced a new feature called Add to Delivery that lets Prime members tack on last-minute items to their upcoming orders with a single tap. Here’s how it works: when browsing Amazon’s mobile app or website, eligible items will show a big, bright blue Add to Delivery button. Add to Delivery joins a long list of tweaks Amazon has made to shopping logistics over the years. For now, Add to Delivery is exclusive to US Prime members. Is Amazon’s Add to Delivery a genuinely useful feature that saves time, or just another clever trap to make you spend more before you realize it?