The milk bottle in your refrigerator has a clear expiration date, but it's a couple of weeks from now. The important question is, when did you first open it? And what about that half-eaten bowl of tuna fish — is it still good? If only you'd remembered to stick on a How Many Days Ago timer, all of your refrigerator food queries would be answered.

The timers, which come with either magnetic or suction-cup backings, are very simple. While most timers count down days to special occasions, these count the number of days since those occasions: like the day you opened the salsa, or the day you took home the Chinese food doggie bag. Counters like these might have other uses, but at two for $10, they're cheaper than an automated smeller and they could well prevent your fridge from becoming a minefield filled with smelly, two-week-old salad. — S.E. Kramer

How Many Days Ago, via Popgadget