Pick the freshest berries possible using my tips in the post

Rinse and wash berries in their container under cool, running water. This removes any dirt, leaves, or other foreign objects. Remove any twigs or leaves.

In a large bowl, add the water and vinegar.

Place the berries in a colander (one berry type at a time) and lower it into the water/vinegar solution. Let soak for 2-4 minutes. Drip the berries dry and transfer them to a clean towel to dry.

Repeat with all the other berries. I do strawberries first, then blueberries, then raspberries last.

Let the berries dry on a towel to remove as much of the moisture as possible.

Line the original berry containers or a tupperware container with two paper towels. Transfer the dry berries to the containers and seal with an airtight lid, or close the lid the berries came in. For even more optimal freshness, add another paper towel to the top of the berries before adding the lid.

Replace the paper towel as needed if it gets really moist or wet. Store the berries in the refrigerator for up to 14-21 days.