Punch several small holes in the bottom of the large metal coffee can with lid for ventilation, keeping the holes evenly spaced. The kernels should eventually be able to vent steam without spilling.

Add popcorn kernels and vegetable oil to the can, then secure the lid tightly. Keep the lid on so kernels stay inside while heating over the fire.

Create a handle by wrapping the coat hanger or sturdy wire around the can, so you can hold it safely over flames. Make sure the handle is secure and centered.

Hold the can over campfire flames and shake constantly for 8-10 minutes until popping slows. Keep the can at a steady height so the flames toast rather than burn.

Carefully remove the lid and pour the popcorn into a bowl. Pour immediately so the steam doesn’t soften the popcorn.

Season with salt to taste, and add melted butter if desired. Toss lightly until the popcorn looks evenly coated.