vacuum container??

65cuda360 said
The beauty of a refrigerant tank is the "Y" valve and the 1/4" SAE flare fittings. I use one for changing boat oil on inboard V8's.

You cannot do that and have not been able to for a number of years. "The feds" put a check valve in the R cans about 1990?

The "old cans" are much sought after, because regulations or no, they DO get re-used by many mechanics.