Today I went out and bought 2 new Jerry-cans (petrol cans, gas cans, containers that hold petrol/fuel/gas). They are metal, and so awesome! One big green one, holds 20 liters and looks like something off a military Land Rover! The second is silver, holds 10 liters, and fits in the boot (trunk...) of my Caterham perfectly! So, wise investment, and they're metal, not plastic, so they're just plain awesome.