Abstract: A urine reservoir is provided for a truck allowing a trucker to utilize the urine reservoir while underway and/or without having to detour from a highway while traveling thereby saving precious travel time and greatly increasing the efficiency of a trucker. The urine reservoir includes a holding tank with a fill system which includes a fill tube with an in-line carbonatious filter which helps eliminate foul odors from entering into the truck cab. The holding tank is positioned and mounted on the truck for quick and easy removal by use of wing nuts and a quick release fill tube disconnecting member. The level of the holding tank is monitored by a float mechanism which audibly and/or visually indicates to the trucker when the urine holding tank should be emptied. The holding tank also includes a deodorant dispensing device which either automatically or manually releases deodorant into an interior of the holding tank helping to prevent foul odors from emanating from the holding tank.