D'Addario Organic Cork Grease is a necessity to prolong the life of your instrument's cork. This lip balm-like topical spread is USDA Certified Organic and contains organic sunflower oil, coconut oil, hemp seed oil, and slippery elm extract. Sold in single tubes or in boxes of 12, it's an ideal purchase for music stores, band directors, private teachers, and any level of woodwind player.