Diesel fuel should be stored in metal or glass containers with a good sealing cap. This is the most important factor in running diesels to keep the fuel “good”. I use old acetone and denatured alcohol metal quart cans to store my fuel. The caps seal well without extra help, though I do wrap the threads of the can with Teflon tape for a little “insurance”. This has served me well - my current can of fuel is 3 years old and still runs as good today as it did when I mixed it. Diesel fuel isn’t readily available anymore, so I just mix my own just as you do - from John Deere ether. I treat the decanted liquid as pure and mix it as such, which again, has proved well for me. I mix my own glow fuel as well; mainly for the cost, secondly for putting in exactly what I want out in. The cost of commercial fuel - glow or diesel, is far more expensive to buy pre-made than to mix myself. The mix I use in all of my diesels (all conversions currently) is 30% ether, 22% castor, 46% kerosene, and 2% Amsoil Cetane Boost. The propellants in the ether cans gas off very quickly when the liquid is decanted, and the light distillate in the ether is minuscule, so it’s not even worth factoring it into the equation.