The types of cooking pot shown here are found in every Iron Age settlement in southern England at this time (about 300 BC-AD 43). At this time in the Iron Age pots were handmade from local clay and fired in bonfire kilns. Pots similar in shape to these cooking pots were used for serving food and eating out of. Iron Age people were not too concerned about washing up and burnt remains of foods are sometimes found on the inside or splashed on the outside of pots used for cooking. The food was poured into a serving bowl for eating. Cooking pots were not usually decorated nor polished, whereas serving bowls could sometimes be decorated and were often polished by burnishing (rubbing to achieve a glossy surface) before being fired.
Reference
James and V. Rigby, Britain and the Celtic Iron Ag (London, The British Museum Press, 1997)