If you are a "contractor" I don't know why you would not want this.
Thick gauge 6 gallon flex spout vented fuel container, prior to the Safety Nazi ban of 2006. For those of you that don't understand cuz you was just sperm, the vented container allows for a smooth flow of fuel that can be regulated by closing or opening the vent with your finger. It allows you to pour without the glup glup irregular flow of modern containers or to instantly stop flow. $35 well spent.
Safety Nazis make it hard for the rest of us. F'n things up trying to improve. Leave crap alone if it works!!