I had used plastic cubes in a box when they were sold for the photography darkroom. Impossible to clean, hard to get all the chemical out.
Same with the accordion bottles. Squeezing air out of regular darkroom brown plastic bottles is OK, just not good for a long time storage.
Instead, I purchased a bunch of new 250ml Amber Glass Large Mouth Bottles. I can mix developer and store in these bottles with no air so it would last longer. Then I could use one shot or 1:1, rinse the bottle, and reuse the next time I mix up a new batch.
I purchased several gross of these bottles, new, surplus from Abbot or Baxter, and have sold dozens to members, if anyone needs any, send me a PM.
Glass is classic, plastic is spastic.