Jars - Some refrigerators bear a close resemblance to a cooling chamber in a biology lab. If your fridge is frequently loaded with half-empty jars of rotting spaghetti sauce and salsa, the Days Ago digital day counter might help spare you the trauma of cracking open a moldy container of sour cream. A magnetic or suction base sticks to the lid of jars or plastic containers. Press the button on top when you attach it, and henceforth, the digital display will tell you how many days have passed since the container was opened. There is also an option to view how many hours have passed, which could be helpful when letting bread doughs rise.