Place 1-2 bags of marbles in the bottom of your bottle. Small rocks work well. Just make sure you put something in the bottom of your bottle to keep the wick from falling through.
Wrap the 1/2 inch wider end of your coupling with teflon tape so it will fit tight into the mouth of the bottle. The idea is to wrap just a bit more than you’ll need. Do that so you can press it down into place after you fill the bottle with torch fluid. Set the wrapped coupling in place but don’t press down firmly yet.
Remove the wrapped coupling and slide the replacement wick through, leave about 1/2″ of the wick sticking out of the top to light.
Place the funnel in the mouth of the bottle and carefully add torch fluid. Add your wick and press in on the teflon tape so the coupling makes a tight fit.
Keep the copper cap on the torch when you are not using to make sure the wick will stay dry. Be careful what you are putting near the torch! Do not leave unattended especially if you have little ones running around.