Review (5/5): Works great on old and new pipe tobacco
These work great. About the size of a quarter and last at least a week on each fill of water. I soak them for 30 min in a cup of distilled water and it keeps my pipe tobacco perfectly moist in the pouches up to 2 weeks on each soak. I added them to 3 year old tobacco that I never humidified which had dried hard like sawdust and the buttons moistened my tobacco back to like new and fresh. It was good to smoke too! Love these things and a must for tobaccoists.