Raw Hydrostone Natural Terracotta Humidifying Stone, Set of 3

These are fantastic - really happy with them

These work for adding humidity to your pipe tobacco. Also for flavor use flavor extract on stone or liquor. Great product.

Utile et efficace

i receive the products damaged in small pieces

I was skeptical at first but after reading many positive reviews I had to check them out. I can attest they are effective, but they don't work the same as a Boveda or a similar 2-way moisture pack. I use them for cannabis I grow and cure that has dried too much. Like others have mentioned they work very quickly, meaning the water that's in the stone will evaporate quickly. This means if you put it in a closed jar with some dried out plant material, you will indeed see the RH % in the jar shoot up fast, but the moisture doesn't absorb fully into the plant material for some time. So, if you remove the stone quickly from a jar with, say, 1 oz of dried out plant material, the RH will drop again pretty quickly as the small amount of water vapor is absorbed, and you're back where you started. The upshot is, if you have a moderate amount of buds or plant material to rehydrate, you shouldn't just pop a fully wet stone in a jar and leave it like you would with a Boveda, because the water evaporates into the air quickly and may not fully absorb for a while, and the RH may get into mold territory in the meantime. Rehydrating very dry plant material usually takes some patience, and I don't recommend more than a few drops at a time on the stone. Let the water fully soak into the stone (a few seconds), place it in the container and give it time to absorb into the buds before rewetting, keeping track of the RH with a meter. It definitely works, but it's a little more work than a moisture packet to get, say, an ounce of dried buds stabilized at 58% RH in the jar, but the nice part is these stones can be reused over and over, and they're very cheap. Highly recommended, especially if you're a grower and, like me, you don't like buying and later throwing away all those moisture packs.