In launching TerraCycle's lines of liquid fertilizer, cleaners, repellents, etc., I realized something: Almost all products that are sold as liquid in a bottle -- from window cleaner to ant repellent -- are in fact extremely similar to bottled water. In most cases, the difference is only 1% to 2% of the contents. In other words, these products are typically 98% to 99% water -- no matter which brand you're looking at, eco-friendly or otherwise. This is true even with TerraCycle products.