Reddit reviews Midwest Can 5600-4PK Gas Can - 5 Gallon Capacity, (Pack of 4)
We found 1 Reddit comments about Midwest Can 5600-4PK Gas Can - 5 Gallon Capacity, (Pack of 4). Here are the top ones, ranked by their Reddit score.
Durable HDPEVirtually eliminates hydrocarbon emissionsExceeds California Air Resource Board (CARB) and EPA requirements for portable fuel containersHolds 5 gallons of gas and oil mixesTwo handles for easier use and handling
In theory, you could carry around jugs of gas for ICE cars.
https://www.amazon.com/Midwest-Can-5600-4PK-Gas-Capacity/dp/B00DW4YLLK
Especially with a large pickup truck, you could carry quite a few of these cans. There is no way to do that with spare batteries at the moment. Plus as you note, the charge time is too long.
This is however a good argument for PHEVs.