Cast iron one would probably cost more, may crack of droped, and would weigh a ton with 5 liters of water in it
Heres a 2.5ltr one
http://www.ebay.co.uk/itm/Black-Cas...e_Garden_Other_Fireplaces&hash=item565a4d1ad0
It will be left in the store we now have
We will have to make sure that is kept full though.