Fridge Deodoriser

I built this few days ago for #iceboxchallenge. Tested for few days and it worked well in my old smelly fridge. I tried others material like coffee, lemon, and tea leaves with limited results , I need to put a lot of such material in the fridge with large container to take effect. To reduce the deodoriser size, active charcoal or baking soda works more effective if air flow slowly through it several minutes, and several times per day. I also tried passive device with a container for charcoal o