BlueHills J02 Waterless Diffuser vs Cooper Bliss Waterless Diffuser

Buy the Cooper Bliss if you want a complete, well-built waterless diffuser with a long battery, quiet operation and a starter kit that fits standard oil bottles. Buy the BlueHills J02 if you want the smallest, lightest unit for a car or bag and care most about coverage claims. The Bliss is the more substantial product: bio-based wood fiber body, metal magnetic cover, 2000mAh battery and 27dB noise, backed by a fuller spec sheet. The BlueHills is lighter at 0.81 lb and rated for a much larger area, but its 20ml capacity and sparse specs make the big coverage number hard to verify.

• Choose the BlueHills J02 if you want a tiny, light diffuser for a car, desk or travel bag and prefer a simple aluminum body with three timers.
• Choose the Cooper Bliss if you want a sturdier diffuser with a 10-hour battery, quiet 27dB operation, four timers and nozzles that fit standard 5/10/15ml bottles.