Some medicines, tests and vaccines are sensitive to heat and/or cold. Therefore they need to be transported and stored in a constant temperature between 20C and 80C to keep their medicinal properties. These items constitute the Cold Chain, the preservation of temperature from manufacturing until administration. This is a considerable obstacle in developing countries, particularly in areas that are hot, isolated and lack of reliable electricity supply. UBD (Use Before Date) is a digital expiration date that uses printed electronics technology. UBD is a sticker that calculates and displays the expiration date of the Cold Chain item. It contains sensors, rewritable memory, a display, a wireless communication system and a battery to run the system. It informs about the tendency of an excursion and prevents items to be thrown away while still being in use. UBD informs and alert in an intuitive way. To make the damage of Cold Chain items visible, this project aims to provide understanding about the condition of Cold Chain items to the end users in a very intuitive way. When knowledge is given, also responsibility is given.