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I have a catalina 3 cu ft I picked up from a thrift store. For what are they used?
since it's full of air.
You making an assumption on what actually in the bottle?
I'm sure I don't have to say it by "Dump and refill if you really want to "try" it out."
Tis a bit small for anything I can think of for an adult, even argon.
Though my 8month old love his 6ft SpareAir bottle! (finally found a use for it!)
No - not an assumption.
Part of my anal-retentive nature says, "If it is worth having, it is worth maintaining." It's been hydro'd, vis'd, and filled.