Lets say that the probability is less for mold/fungus to build up there. I was posted to Shanghai for 2 years, and no dry cabinet. And just recently to Paris for a year and still no dry cabinet. Basically, if I need to use my lip gloss, I know that the air is relatively dry so you shouldn't need one. But be careful in summer when humidity seems to increase. If kiasu, at least bring some thirsty hippo for backup. But for me I'm sufficiently comfortable not to need one.