In essence, waste cooking oil comes mainly from fast food restaurant chains, catering businesses and Chinese restaurants. The quantity of waste cooking oil available for recycling as biodiesel feedstock can be estimated at around 42–44% of the cooking oil for consumers using 10–2500 l per week. In general, larger quantity of waste oil is more likely to be sold than given away. However, sale of waste oil may result in greater competition that raises the price of RCO stock which can breed unethical recycling of waste oil back into the food chain. Provision of storage containers requires standard-is ation of containers and establishment of procedure while noting that it may be feasible for small operators to place waste oil in the original containers. Greater public awareness has to be created to cultivate the practice of recycling waste oil, especially as a source of biodiesel feedstock.