Pic borrowed off the net, 4.5 litres, or 1 gallon. Made in New Zealand, 20 -30 yrs old, no longer in production. U can still get them second hand but very hard to get in this size. Please support these horse rescuers !!!! you don't have to join or anything , free , no cost , the more traffic the better and it gets updated daily. www.fuglyblog.com.