Product review (5 stars): Rico Reed Vitalizer Humidity Control Single Refill Pack, 73% Humidity
This stuff is great! I use the refill packs in generic sealing quart plastic bags, since the reed boxes I use are large. I play bassoon and contraforte in the National Symphony Orchestra, and this product has saved my so many times by keeping my reeds mold free and just wet enough so that they remain stable no matter what the outside humidity level or temperature. Highly recommended!