Zippo 12FC Lighter Fluid, 12 Ounce , Black

Q: How many refills of a standard size zippo is the 4 oz bottle good for?

In my experience the zippo takes about an ounce the first time and roughly half that for refills. E.g. 1oz+ (3oz/0.5oz)=7

Q: Why wont it let me buy this? It says unable to send to your address?

In the state of California, butane was listed as a controlled substance in 2019. It's still legal to buy it in small quantities, or in large quantities with a permit, but Amazon won't ship it. There may be similar restrictions in other states and countries. Incidentally, ethanol fuel was banned a few years back in California. 🙄