Best Reed Diffusers The best reed diffusers are those that are DPG-free, alcohol-free and phthalate-free reed diffusers. Why should you be so particular about your reed diffusers? DPG, or Dipropylene glycol, is commonly used as a carrier for fragrance oil and diluting fragrance oils. With DPG in a reed diffuser, it usually evaporates faster. Since … Continue reading Best Reed Diffusers