Here's the one I made, bought the unit from Woolies (GLADE) not Airwick, used it at home till all perfume used up, cut the "bottle" off the iside and retained the battery holder then cut it up and added a little mesh and a spray with some silver paint, had it 2 years and the bateries sill going (not full time of course).
SORRY it seems I can't put in a photo, have a look at the thread from CandM forum below. post #8 is mine with thw photo
http://forum.candm.com.au/showthread.ph ... ght=fridge.
picture prior to modification