375ml Bottle, Prato Lungo. The Prato Lungo olives from the oldest grove in Napa Valley, the proximity of our mill to the grove, our milling methods and mill master, Sean McEntire, are the perfect recipe for an extra virgin olive oil with extremely low acidity and a silky smooth mouthfeel. This unique combination reinforces the 14th release of Prato Lungo Organic Extra Virgin Olive Oil as the king of our finishing oils.