Young VP’s (less than 5 years old) can often last 4-5 days once opened. However, older VP’s (more than 15 years old) are not meant to be left open for more than 2-3 days. They won’t spoil if left open longer than that, but they will lose their freshness and seem a bit more subdued than they did when first opened, especially the aromatics. Really old VP’s (more than 25 years old) are at their best if consumed within 24-48 hours.