Sterilize the containers. I had beautiful mini bottles (and a jar!) that I cleaned in the dishwasher and used immediately afterward, when still hot.
Prepare the herbs and spices. This means clean them: I used water, vinegar, and baking soda. Then rinse and dry them very well with a kitchen cloth
Peel the garlic and engrave the chili with a knife.
Fill the bottles with olive oil - enough to cover the herbs and spices entirely.
Remember: you need great quality extra virgin olive oil, and you need it fresh: olive oil starts losing flavor after a year.
Decorate the bottles to make infused olive oils gifts. I used bakers twine, labels, washi tape, and stickers.