As mentioned, they're plastic and have a really good reputation and following.
The other option: RotoPax.
Personally I really do not like RotoPax for the following reasons:
- TOO expensive.
- The common sizes don't carry enough liquid. (I expect 5 gallons to be a minimum for fuel, water or whatever for overlanding) I mean, who would carry a 1, 2 or 3 gallon fuel jug unless you're a mow-n-blow for your gas powered mowers! Their largest container is only 4 gallons! REALLY??? And that costs $110.00!! You can get a Scepter 5.3 Gallon can for $37.80 on Amazon: Amazon product ASIN B07ZWF4W8Z
- And did I mention they're expensive??
Yeah, they look high tech and all, and they are slim if you want them on the side of your rig.

I have 2 Scepter 5 gal cans, a red (for fuel) and an OD green that is always on the back of my rig which is used solely for potable water.
Although to tell the truth, off roading today in the twenty first century, one would be very had pressed to not be in range of a gas station unless you're an idiot and start a multi day overland on half a tank!
Even when our 4x4 club did the Mojave trail over 3 days of wilderness, they suggested that you should bring along an extra 5 gallons of fuel, so not having done that trail before, I did.
Never needed it. Finished the trail with, if I remember correctly 1/8 to 1/4 of a tank left. When I got home I had to empty the 5 gallons into my gas tank since I never used it...
Truth be told, in all the years of off roading and overlanding (25+ years) I have yet to ever, even be close to running out of fuel. Think about it, going slow on a trail for several days you'll get probably about 10 MPG. At 10 MPG using only 22 gallons of fuel (not emptying the tank) you'll go 220 miles! That alone would get you across most of the states in the U.S.! And how many gas stations are in a state?? You would be hard pressed to find any place in the U.S. that would be farther than a tank of gas away from a fueling station. Maybe Alaska?? Deep north Canada??