Idk where i seen this at just putting out there again, this is great for cleaning pipes and cheap as hell. you can use a coffee filter and filter it back into the can and use it a few times. NON-TOXIC, BIO DEGRADABLE i wish i could quote this from who ever i learned this from Walmart.com: Simple Green Concentrated All- Purpose Cleaner Refill, Lemon Scent, 2 Liters: Household Essentials