ResRemover Reusable Pipe Cleaner is an easy to use, plant-based pipe cleaner, absent of solvents or salts. The resealable bag system makes it really conducive to cleaning your small, glass hand pipes. The bag comes with a powdered cleaner and you JUST ADD HOT WATER to the fill line and drop in your pipe overnight. ResRemover is SAFE on glass, quartz, acrylic, plastic, silicone, metal and ceramic. Made in The U.S.A.