Floral Flush RV Toilet Treatment Drop-Ins help control unwanted odors and break down waste and tissue in your RV waste holding tank or portable toilet. These easy-to-use drop-ins have a blend of lavender vanilla-scented surfactant oils that trap unwanted odors in your tank, making your camping experience more enjoyable. They are septic safe, environmentally safe and 100% biodegradable. The drop-ins do not contain the toxic, formaldehyde-releasing ingredient bronopol. Comes in unique retro-style packaging that looks great in your RV bathroom. Each bag comes with (10) drop-ins.