When I had a humidor it had a glass top and glass front. I didn't notice significant leaking due to the glass, and liked having the ability to decide what to smoke without opening the humidor. You just have to keep it out of sunlight. When my cousin lived with me it would have been nice if my fridge had a viewport so he wouldn't stand there with the fridge door open for 20 minutes deciding what salsa to use for his burrito.