Start by cleaning the chilies and pat them dry.
Based on your heat preference for the vinegar, make a small slit in each chili for a milder flavor or cut them in half for a hotter vinegar.
While handling the chilies, remember to wear gloves for safety.
After prepping, put the chilies into the sterilized glass jar or bottle.
Heat the vinegar gently in a saucepan, warm but not boiling.
Pour the warm vinegar carefully over the chilies, making sure they're entirely submerged.
Let the mix cool down entirely before fastening the jar or bottle lid.
For an optimum flavor payoff, let the vinegar sit for at least a week before you use it. The longer it infuses, the stronger the flavors!