Not to start a rumor, but there was speculation that a small number of unscrupulous individuals, would buy a can of pre-mixed fuel, and take it back to an easy-to-return / no-questions-asked type retailer, filled with pump gas.
I have no direct knowledge of this. Could happen with any brand. Maybe less likely at a full service dealer than a ‘big box’ store?
I have seen used, dull, dirty, grungy chains returned in those clear, plastic, clamshell-type packages. The clerks take them back. I saw them at a place that sold returns and closeouts.
Tamper-evident seals on the cans would discourage some of this, or, at least give alert purchasers a ‘heads-up’.
Philbert