Walex TOI-91799 Porta-Pak Holding Tank Deodorizer Drop-Ins, Sunglow Scent (Pack of 10) Just drop it in Unbeatable odor prevention Pre-packaged portion control- no spills Breaks down waste and paper Formaldehyde-free Number 1 portion contol deodorizer in the world Unbeatable odor prevention Formaldehyde free Non-staining color Deodorizes and breaks down waste and paper