Product design is not just about usability. How we feel about a product makes a lot of difference. The research shows that two identical applications—with similar failure rate, but with a different take on dialogue box writing—result in very different perceptions of usability by its audience. The application with polite dialogue text always wins.
Emotional design deals with how we feel about the product. Interfaces design is all about the look and feel and is responsible for a large portion of generated user emotions.
Here are some examples of bag designs. If you want to encourage recycling, this is a great way of making these bags valuable—the users won’t throw them out after one use.