A: Yes, juice or distilled water can go in the pucks, normally I fill with distilled water twice for every one time I use the juice. This keeps the cost down. As far as crystal gel goes, those are meant to replace the foam pucks and work a heck of a lot better. I highly recommend ditching the pucks and buying a crystal gel jar. They are easier to maintain and also resist mold and over humidification. Copy the following link to visit our Cigar 101 section: http://www.cigarsinternational.com/cigar-101/ You'll find a lot of info on humidors that will get you informed and free from any future humidor headaches.