I have a couple plastic peanut butter jars and a ricotta cheese container that I washed and saved. What do you stock in these containers?
You bet your butt I do!
Everything from keeping the toilet paper dry to small parts in jars that don't break!
Every home shop in America used to have a row of baby food jars under a shelf, lids screwed to the bottom of the shelf, so you could see what screws, nails, ect. you had,
Kept them close at hand, visible, out of the way, used spaces that were otherwise wasted, and kept those little jars out of the landfills.
People don't think like that anymore, but it's going to save you MONEY,
So no reason NOT to do it!
The larger Peanut containers (Square Plastic) make GREAT storage containers you can see what's inside without taking the lid off and pouring everything out!
Makes for GREAT reuse, everything from water tight storage to flotation in an emergency!
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I cut the plastic water bottles off and use the 'Cups' for everything from starting plants in to wasp/bee traps.
The BRAND of peanut butter, peanuts, mayo, pasta sauce I buy often depends on what jars they are in.
A lot of pasta sauce comes in REUSABLE canning jars, and that saves me money on jars, which DO NOT live forever...
Even the smallest crack or chip in the rim makes it useless since it won't seal up anymore,
So putting some new ones in the process is mandatory,
So when I buy sauce, I get it in the reusable jars.
The square peanut containers make for good storage that Doesn't Break when they get rattled around...
I use the crap out of them, and when you buy the larger sizes, you get a better deal since you aren't paying so much for the packaging in the larger sizes.
Finding the peanut butter jars that DO NOT neck down at the top, stay full size all the way through the neck are the best for me since I have big front paws they make it easier for me to get into.
Like I said, the little water bottles (Clear Sides) make for good plant starting containers that are free,
And since they make boxes that EXACTLY FIT those size containers,
'Flats' of transplants are easy...
I even use the colored bottles, Mt. Dew for example, for small batches of this or that.
The color of the container tells me it's a different kind of lettuce or tomato starts since you can't tell the difference when they are first sprouting...
Taking old milk and juice jugs, filling them with water, and punching a small hole in the bottom,
Then sitting that jug next to your plant will water for several days without dragging out the hose,
And you are reusing the container (Which is petroleum based, so all the lives you can give it make sense).
Some people punch holes in the caps then turn the jug upside down in the dirt for it to water the plants...
This works VERY well, since every drop goes to the plants roots, no evaporation at the surface...
And the jugs don't leak on the way to to the garden like holes in the bottom will!
Reduce, Reuse, Recycle....
Saves you a TON of money, and keeps the crap out of the landfill!
Just to tell you what I do with these,
Our 'Quick Camp' is in one of the Peanut containers...
Rain ponchos, emergency blankets, fire starting, jerky, rice, tin cups, foil packages of tuna, water purification tabs, zip lock bags, salt/pepper/chili powder,
You get the idea...
I keep one in most of the vehicles and there is one in the camping gear...
Comes in REALLY handy!
My garage shelves are plastered with these containers, both round and square.
I can see what's in the container, and they are GREAT for those small parts that don't take open exposure or rattle around in metal drawers very well.
Keeps things neat, organized, easy to find and free of rust, corrosion, dust, ect.
I'm sure there are 'Better' ways to store all this stuff,
But I LOVE peanuts, peanut butter, pasta, so this isn't a problem for me...
If someone doesn't like the way my shop is organized, they can go somewhere else and pay a bunch more for the overheat of 'Proper' storage containers, bins, ect.
My welding rods don't care if they are kept in humidity controlled conditions in an old refrigerator, or a $20,000 rod oven...
As long as they are dry, they are happy, and I'm not inclined to buy a $20,000 rod storage oven as long as that old fride with a 15 Watt humidity controll rod is there...
PLUS! The little light comes on when I open the door looking for rods!

The biggest grip I have is that I can't get a magnet to stick to the door of that stainless fridge!
I can live with that for $20,000 savings...
REDUCE, REUSE, RECYCLE!