Alternative for when you can't get the can up high enough to siphon feed it. These things are $9 and work surprisingly well for the price....especially on thinner stuff like gas and diesel. I pumping transmission/gear oil for my little car the other day. I moved about a gallon and then really slowed down.I don't even use spouts on gas cans any more, this is my go to, and part of my trail kits in my rigs.