While pondering about what to write, I decided I wanted something to drink. I went downstairs and grabbed a glass and poured some milk in it. As I looked at the milk, I checked the date to make sure it was “healthy” enough to drink. The carton said “Sell by 1/27”. As I looked at it, I thought, well doesn’t help a lot, where is the best by date? That got me to thinking, how long does something last past its “sell by” date.