Humdakin fragrance diffuser refill 250 ml is perfect for the fragrance diffuser set in the same scents from the brand. Simply remove the lid from the original bottle, fill the glass bottle with the new oil, and replace the old diffuser sticks. Choose between Humdakin's two signature scents Ample and Ivory for a safe and welcoming atmosphere in, for example, the bathroom, bedroom, or living room.