The tins make excellent containers for patches. And, as Stumpy showed us they can be modified to make a much different shaped tin that will be the envy of many Mlers.
But NO tin will seal well enough to store patches lubed with a water based lube for many days or weeks. The reason to use Beeswax in a lube mix is because Honey is nature's antiseptic- ie. it has enzymes in it that kill bacteria. Those enzymes are also present in "Bees Wax", and prevent bacteria from forming and eating the fabric of your lubed patches. That allows these greased patches to be stored longer, in good condition than if you use some other wax for you lube mix.
I use spit, water, and water based lubes on the firing range, where shots are fired fairly soon after the PRB is loaded down the barrel. However, when hunting, I switch to my Wonder Lube, or home-made Olive oil/beeswax lube. In sub freezing temps, the dry air sucks the water right out of the patch within an hour, and allows oxidation( rust!) to occur where the patch is placed against the rifling in your barrel.
You don't want rust in your barrel! :shocked2: :td: :nono: :shake:
Be very conscious of the air temperatures when shooting BP. When temps drop much below 40 degrees, the air begins to dry out. In the high mountain states, relative humidity is so low it may as well be below freezing. You may have to adjust your lube choice several times during one day's shooting, when you have a huge change in temperatures and relative humidity while out shooting. :hmm:
I happen to live in a "Middle area" here in Illinois, where we can have huge changes in weather based n whether we have a Cold High coming down from Alberta( Alberta clippers), or
strong warm winds blowing up out of the Southwest, but bringing heat and moisture from the Gulf of Mexico. And, this can change in one day!
This kind of change can not only make life miserable for hunters- I suffered hypothermia one day when deer-hunting in far Southern Illinois--, but it can give you fits if you used the wrong lube on your patch that is in the gun. :hmm: