ProViva Cultured milk should be treated as a perishable product and stored at a maximum temperature of 8°C. The product has a designated shelf life of 23 days. The ProViva products are labeled with a “Best before” date, which means that the product can safely be considered to have a shelf-life of a few more days if stored in an unopened container at a maximum temperature of +8°C. Opened containers keep for about one week in the refrigerator.