I was just thinking I was going to have to replace my Hoppies #9 that I bought when I got out the Army 20 years ago this year......................................
That's about my usage rate for Break-Free, Hoppes or Ed's Red. It takes about two drops (1 drop = .05ml) to wet a patch and I run one wet patch of each down the bore each time I'm done shooting because I have no idea when I'll get to shoot again, or even peep down the bore. Since I'm not a match shooter, I don't think it's hurting me too much. Also, as will happen here in a couple days, we'll go from below zero to +50F over night, and EVERYTHING not in the heated part of the house sweats badly. Guns I keep "handy" tend to be exposed to a significant range of those swings.
I also waste a lot more than I USE of either, especially Break-Free, because of the wasteful dispensers on the bottles. I recently bought two tiny Pro-Shot bottles of bore cleaner with needle-like spouts, emptied the contents into a waste-oil jug, rinsed and filled one with Break-Free and one with Ed's Red. I'll likely never have to ever buy either again now that I have an efficient delivery system.
I have a 20 year-old, unopened quart of Hoppes which will likely make it into my estate sale - unopened. I'm using out of a 4-ounce bottle and can't remember when I bought it.