Aggravating gas cans

My sealed cans always seem to be pressurized or have a vacuum? This may be from temperature change and/or vapor pressure of the fuel? If you seal your cans, how do you accommodate this? I have some metal cans that have been crushed in the winter by temperature change. I assume that keeping all the cans nearly full would be helpful but this is hard to achieve.
 
I've got one of the Eagle 5 Gallon Metal Gas Cans (Item #145709, Model #UI50FSST) from Lowes last year and has been working quite well. I paid about $75 back last year, so prices have gone down a little.
 
My sealed cans always seem to be pressurized or have a vacuum? This may be from temperature change and/or vapor pressure of the fuel? If you seal your cans, how do you accommodate this?

You have to vent them. I install those yellow vent holes and covers in all my plastic cans. If your cans must be sealed, then having them flex with the temps is the price to pay.
 
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My sealed cans always seem to be pressurized or have a vacuum? This may be from temperature change and/or vapor pressure of the fuel? If you seal your cans, how do you accommodate this? I have some metal cans that have been crushed in the winter by temperature change. I assume that keeping all the cans nearly full would be helpful but this is hard to achieve.
When mine are in storage I just barley loosen the cap or vent. I have the Tractor Supply type spots and vents. When transporting I just tighten the cap and I'm good to go.
 
So I know that this has been brought up before and I have a 5 gal. Eagle that I use for regular gas than I also have 2 1gal cans for mixed gas for the 2 cycle engines. If I needed to replace either of them I would be looking at, Crags, FaceBook marketplace or maybe even a few ward sales and find good old school metal gas cans. Before righting this I did look and found many of them available.
 
When I was looking for a steel can like the Stan Can for my emergency supply on my boat, the ones that I found on eBay were rusted badly but you would have thought that they were made from gold.
 
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