Nothing's worse than grabbing that leftover casserole from the fridge, opening it up, and getting a big whiff of spoiled, moldy food. Keep track of the age of the items in your fridge with DaysAgo, a digital day counter. With either magnetic or suction bases, these little counters simply count the time since you reset them. Attach them to any container (or anything else around the house) and quickly tell at a glance how long they've been there. $12 USD for two, with free shipping.