I have used the heavy plastic Ragu jars for storing mixed chemistry with good results, always keeping a layer of Saran Wrap between the solution and metal lid. The food grade plastic is much heaver than the soda bottles and permeability of gas/oxygen is just that much more difficult.
These Ragu jars with handles are also great for mixing and handling the line for roll film developing. The large mouths pour and accept return of the chemistry from the tank quickly and the handles are a relief for arthritic and sometimes wet hands.
I am currently using mostly wine bottles, 750 ml. and 1.5 L. for D76 stock and replenisher, as well as other chemistries, mostly developers and selenium toner. Because I am compounding my own developers, other than the HC-110, I can easily adjust for how much solution I have to store initially, so there is no wasted developer or excess air space.
My personal experience with HC-110 is the concentrate will store well long term in the original bottle without gas top-offs or fillers like marbles, IF the storage temperatures are between 60-75º F. I also use a large syringe to take syrup from the bottle for one-off developing, dilution "H" being what I mix most often from that bottle.
I should also note that I've been cautioned in the past to avoid marbles as fillers because of 'soda glass' reaction with the chemistry, however, it is my understanding that most common glass is in fact soda glass so I'm unsure what the real story is there.
Perhaps someone here has more reliable information as to any pros and cons of the practice.
