One of my wife's friends has just been round. She has started to collect old cooking oil for recycling purposes. I think she sells it to the companies that manufacture bio diesel.
Anyway....she has given us an empty oil can, I think it holds 20 litres (it's the size of the large cans in Makro), that we will fill with old oil. When it is full we give her a call and she comes to collect. She will give us 200 baht for the oil and give us a replacement empty can.
If anyone is interested in helping this enterprising idea the please let me know. I will arrange for an empty can to be delivered to your house.
Thanks