The "Urine Off" Bag-In-Crate (BIC) Concentrate System makes five gallons of ready-to-use Formula. The heavy duty reusable plastic crate and flow regulating tap make it easy to refill sprayer tanks. The BIC system is economical and convenient for large volume users such as installers and carpet cleaners. It makes storage of large volumes of "Urine Off" very convenient with the small foot print of the refill bags. Note: Uric acid can damage dyes in some carpet fibers. You may see a difference in the color if the fiber has been damaged, even if the urine is removed.