Simple way to refill all the old lighters for you or your grandma or for your friends… Every man can buy gas lighter refill fluid in every Internet store -eBay, Amazon, AliExpress etc.
Search Gas lighter refill fluid. Refill fluid (Butane, propane) the price is around 1 euro.
Check out this video lean step by step how to refill your gas lighter.
We have our gas and our gas lighters are BBQ/torch type.
That's how we see how much gas it has.