Just dampen and it keeps your materials from drying out.

Amazing

This was probably the best Christmas weed gift I could give to 2 of my friends. They both suck at keeping their flower fresh, and are even worse at rehydrating. These little magic gems takes the guess work out of it. Soak for 5 min. in water place in quart bag with container of flower open. Boom freshness in about 45 minutes for most.

This thing works great. A little too great if you don't have enough herb in your jar, if your smoke is burning weird uneven like the herb is too wet, just add more herb to your jar. Then it evens out and rehydrates perfectly

I don't have too much to say about this thing except that it works. If your herb normally gets dry then it's probably worth the money to buy one of these. One thing I do have to note is that they don't fit in really small jars but you'll probably be fine.