Strawberries are extremely perishable and should be refrigerated immediately. Store unwashed strawberries in the refrigerator by stacking them on paper towels (between the layers as well), in a moisture-proof container. Eat them within 48-72 hours, or freeze them. Most berries freeze nicely, and will keep up to ten months in the freezer. To freeze berries, rinse gently and dry them in a colander or on paper towels. Then, put them on a sheet pan or tray in the freezer for one hour. Once frozen, store them in a freezer bag/container. This method will prevent them from sticking to one another and makes them easier to measure out for future needs.