This episode really shows how far they have stretched the premise. Dry ice vending machine? Sure! Natural gas vending machine? What could go wrong?!
It's so stupid it scratches the part of my brain that just can't get enough of stupid isekai as long as it is original in its stupidity. The real sin in trashy isekai is to be boring.
Atleast it delivers on the vending machine as a premise. Imagine being called candy isekai but there's no candy. Or smartphone without actually using your smartphone to solve problems.
I honestly had to look into this, because it felt way over the top. But they actually do exist.
Dry ice vending machines are in stores, so that frozen goods won't melt on the way home.
As for the natural gas vending machine, those were directly hooked to a stove. Putting in coins and spinning the crank made it dispense gas for 10 minutes. But there's also seemingly no information on these on the english side of the internet.