Here is a picture of my fuel cart. What I like about it;
It lines up well with the tail gate on the pickup, if you don't have a pickup this system still beats lifting the cans individually five feet off Terra firma.
You can take the furl out line off the fuel cell tank, extend it to a five gallon can on the floor, put the fuel nozzle (previously fuel out from the cell) into the fuel cell and fill the cell. This way you never have to lift anything off the floor or out of your trunk (remember, the cart has four wheels) As you may have surmised, I'm too old to be doing any of this.
The cart is composite, very light and purchased from Uline I think. I'll look it up is anyone cares to know.
The fill nozzle is very convenient, with no spillage.
I've pumped over fifty gallons with it without a battery charge.
The black fuel cell is standard circle track stuff, pricey new ($300.00) but cheap if you scout around your local auto racing shops. Everything is AN so it becomes a safe reliable integration.
What I don't like;
The cost adds up, I had the cell but if you bought it all new, over six hundred bucks.
It's one more d**n "system" that needs to be maintained, pampered and charged.
There has been some discussion about filtration. I fill the cell, whether at the gas station, or from five gallon cans, into a funnel with an automotive paper paint strainer. I have no idea what it's micron rejection is but will probably get a lesson on it shortly