Storing liquid inoculants for biochar

I mainly charge my biochar with liquid inoculants because it's faster.   Warning: this post might make you slightly uncomfortable. The main liquid inoculant that I use is urine.  I used to store it in plastic fruit juice containers on the back patio.  Then I realized that it was more convenient to have it in the bathroom.  Then I realized that I might not want to have so much plastic in my soil.  I started storing the urine in wine bottles.  I realized that pouring it into the wine bottles was somewhat difficult. Then I started saving up spaghetti sauce jars, which are glass.  Now there isn't any urine stored in plastic jars, but I may transfer it from the bathroom to outside in a plastic jar.  I am considering leaving more old glass spaghetti sauce jars in the bathroom to avoid the plastic altogether.  As always, I welcome anyone with a better idea.

John S
PDX OR

Just saying, this sounds like the start of a hell of a limerick.

I wanted to water the garden with pee
but how to save it without plastick-y?
A bottle of wine
Will do really fine
to give my plants lots of nitrogen, you see!
(sorry)

I love the idea of horrifying guests with wine bottles full of pee. I also am way too butterfingers to permit there to be glass in my bathroom, I'm afraid.
We don't have this particular problem but I think I'd probably produce it as needed and use when fresh, since this particular resource is pretty abundant, let's say!

I see stainless steel water bottles at the thrift store for cheap, and even the new ones are reasonable, considering their longevity.
One 64oz stainless steel "growler"  is plenty of pee to be transporting at once.
32oz is probably enough.
For bulk storage outside, consider a metal coffee carafe or an percolator.
Top the pee with a layer of vegetable oil to keep it from interacting with air.
For a huge storage vessel , get an old water heater.