Originally Posted by
unterhausen
my experience here in the U.S. was that they wanted to sell me a small tank in preference to renting me bigger tanks.
Of course. Small bottle refills yield greater profit because they charge more $ per unit of measure - grocery stores have been doing this for decades. And if you own the bottles, you are responsible for, and are expected to pay for required hydro testing when due - which can often exceed the value of the bottle.