These are the ones I bought because they fit the cans I had. They don't fit just any jug, you have to figure out which ones fit what brand, some have comparability lists, other times you need to find out by trying one from another can out in your shop.
These worked great on mine:
http://www.ebay.com/itm/Scepter-Jer..._DefaultDomain_2&hash=item2c660402df
