What you can use in your handmade clay oil burner:

Essential Oils: Essential oils are a popular choice for oil burners. You can use single oils like lavender, eucalyptus, or citrus oils, or create custom blends for specific moods or purposes

Scented Wax Melts: Wax melts, when melted in an oil burner, release their scents into the air. They are available in various fragrances and can add a lovely aroma to your space.