Plastic Jerry Cans
Scepter is Good. Still in use by NATO forces, the UN, US, Canadian, and British military. If these guys aren't destroying them, pretty likely you and I wont be.
These are also pulled from the shelves in the states, so you have to order out of Canada, or find old military stock.
As with anything, beware of no name chinese knockoffs. They are stocked in my local surpluse store, and from my inspection were thin plastic and didn't seal well. (Tightened the cap and stood on it.. air leaked out)