Easy drop-in packet eliminates the need to measure your holding tank cleaner and also prevents unnecessary spills. Each of these water-soluble packets breaks down waste and tissue and offers commercial-strength odor prevention. The formaldehyde-free packet leaves behind a soothing, fresh lavender scent. Easy to store, resealable zipper bag. Use one packet per 40-gallon tank. 10 per pack. Commercial-strength odor prevention Leaves behind a fresh lavender scent | Walex Porta-Pak Holding Tank Deodorizer and Waste Digester, Lavender Scent