How long does a wax last in its container?

I put blue painters masking tape around wax container where lid meets container to keep air out.
 
"Can I get 5 to 7 plus years on them if I keep them inside and shake them every few months"?
I've got 25 to 30 years on some products, without shaking them. I'll post a pick of my collection. I've got usable products older than some members on this forum!
 
I have a gallon of Gold Class wax is 8 years old the water separated from the wax or something like it.I guess I will blend it to see it goes back to normal.
 
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