Tag timer for better use / Personal care products

People use several kinds of personal care products every day. The best use date and the shelf life of personal care products are totally different. However, only 62% of users are still using the personal care products that are over the best use day. Users often forget the date that they started to use products. Thus people are ignoring the best time to use the products and continually use. Using the products that over the best use day may cause some personal health issues. This design can directly remind people the status of the products. By changes in the tag, people can clearly know that the product has passed its better-use period or not.