Diesel Storage
I experimented with some diesel storage options, and one that worked out well is mylar water storage bags (in cardboard boxes)
DO NOT TRY THIS FOR GASOLINE! It wont work!
Reinforce the Spout
I used a little hard-board to reinforce the spouts, not a necessary step but it helps when using the flex pipe as a spout .
I used some basic plumbing drain parts to make a cap. This took some fiddling to find a combination that was leak proof and air tight, but it is do-able.
The original silicone caps also work fine, but pouring the fuel out requires a funnel.
I used yellow duck-tape to close up the cardboard box- on my water boxes I use clear packing tape- but I wanted the fuel boxes to be a little stronger and easy to recognize.
Flexible Drain Pipe As a Fuel Spout
This won't work with the smaller fuel inlets on cars, but it does work with truck size inlets.
In hindsight I think staying with the original silicone caps and using a large funnel is better, but if you want to experiment, this worked out pretty good.
Add the Recomended Amount of Diesel Fuel Stabilizer
Fill with fuel and add some fuel stabilizer. I was sure to press all of the air out of the bags before capping it closed.
I left one box sitting outside in direct sunlight from April through October without stabilizer and it was still clean and ran fine.
I stored four of these (with stabilizer) inside a shed for a year and the fuel was still clean and ran fine. This might not be the most ideal storage method, but it does work. At less than $10 per unit (I paid $76 for 10), it's stack-able and tote-able.
The best thing to know is the Mylar bags will hold diesel, and as long as the bag is air-free the fuel is usable for at least 6 months, a year or more if you add stabilizer.