I store the bleach in an airtight, clear plastic 5 liter bottle. The toner is in an airtight, brown 2 liter glass bottle. I have approximately 1.5 liters of toner in the bottle.
I've also heard that MGIV FB doesn't tone well, but I have so much of it and I want to use it up before it goes bad. My earlier test print using MGIV FB turned a beautiful chocolate brown. I would like to duplicate that colour.