Here is a quick tip to preserve berries naturally. Instead of regular vinegar, we used apple cider vinegar.
To keep the strawberries fresh longer in the refrigerator, use 1 Part White Vinegar to 10 Parts Water. Soak the strawberries, leaves and all in the vinegar/water mixture for a few minutes. Then drain the strawberries in a colander until they are completely dry.
Then I place my strawberries in an uncovered bowl in the refrigerator. The vinegar/water mixture kills any mold spores on the strawberries and keeps them fresh longer. The vinegar does not affect the taste. This also works for all kinds of berries: blueberries, raspberries, blackberries, etc. It really works!!”