Oil and vinegar are the condiments par excellence. Olive oil is produced by grinding olives and extracting the oil by mechanical or chemical means. Green olives usually produce bitter oil and over-ripe olives can produce oil that is rancid, so for a good extra virgin olive oil, one has to make sure that the olives are perfectly ripe. Vinegar comes from fermented liquid. When bacteria combine with oxygen in the fermented liquid, acetic acid, also known as vinegar, is created. Some people believe that vinegar was first discovered by accident when a wine barrel was stored too long and became acidic. Oil and vinegar filling lines can operate with: manually operated dosing semi-automatic dosing on a rotary table semi-automatic dosing on a belt line including capping and labelling automatic dosing on an automatic line including filling, capping and labelling.