Fresh Straps locking waterproof portable restroom air freshener straps from Surco Portable Sanitation Products cinch onto the vent pipe, or anywhere the tech can place them out of sight and out of reach. They are opaque white, scent-infused plastic straps with a self-locking feature that deters theft. They freshen with powerful fragrance for up to 60 days, and are available in Xtreme Clean and SummerFresh Lavender scents. 800/556-0111; www.surco.com.