Blueberry Buckle Ever had Blueberry Buckle? Is it a brownie or a cake? What exactly is a buckle? We aren't sure either other than it is delicious!! Fresh Blueberries mix with white sugar and white cake in our Blueberry Buckle. Heavy on the fresh, ripe blueberries in this one! Scent Strength - 4/5 - Strong Blueberry, Semi-Sweet Diffuser Oil Turn your home into a fragrance masterpiece that your guests will talk about for days to come. Dixie Grace Diffuser Oil is ready to use in any waterless air diffusion system designed to diffuse fragrance or essential oils. Our fragrances are blended in our Dixie Grace workshop in the Midwest and are phthalate free. Make sure to follow specific instructions for each diffuser as each one is different. Warning: Our Diffuser Oil is highly concentrated and may cause damage to certain surfaces. Please use caution when adding to a diffuser for drips and spills. Do not ingest. Store at room temperature (between 60-85°F).