Let's you drop and drag fish and prepared food into coolers. The cooler will keep them fresh for longer. Don't us the eat interaction while the food is still in the cooler. Drag it out first before you let your Sims consume the food.
Obviously, the 16 personalities of the Myers-Briggs Type Indicator® These personalities are meant to sit in the background of the standard 3 personality traits from Maxis default to differentiate Sims a bit more.