Fresh Straps self-locking portable restroom air fresheners from Surco Portable Sanitation Products are waterproof air freshener straps that cinch to the portable restroom vent pipe. The self-locking feature deters theft, and they last up to 60 days. They are available in Xtreme fresh, lavender and berry cherry fragrances. They are packed 72 individually wrapped straps per case. 412-789-8683; www.surco.com.