Power Service diesel additives packaged in 16-ounce, 32-ounce, 80-ounce and 1-gallon containers are packaged as single-use containers with a tamper-evident seal. Once the seal has been broken, the container cannot be resealed and product will leak if the bottle is not kept upright. The best practice is to use the container sized for your fuel tank capacity. Do not store previously opened containers in your vehicle and be sure to clean up any spills immediately.