(Herbal vinegars or oils...)

  
Chili Vinegar
  

Put a few little hot red chilies (dried or not) - and a garlic clove or two, if you like - into each bottle you’re going to use... Fill the bottles with white vinegar and let all steep in a dark pantry for a minimum of 2 weeks. Great to use when making guacamole, if not salad dressing and whatnot.