have you got a metal 5-litre oil can that you can let me have?

[Halski]

for one of my science experiments I need several of the 5 litre Castrol type oil cans - they must be metal with a screw top - has anyone got one in the garage to give me? I will pay for postage of course, or if they are full of uasable oil, I will buy the can from you - if not does anyone know where I can buy them? Halfords sell them full of oil but its 20W 50 so I would have to throw the oil away and its £17.99 and I need about 4-5....

thanks for any help you can offer