I have some of the euro military cans and I use one of the Harbor Frieght shaker syphons. Works well, empties 5 gallons quickly and is cheap enough to have several spares.

Have also used one of these,

http://www.flofast.com/products.html

A little pricey but works well. And gives you the ability to pump into or out of your fuel container depending on the direction that you turn the handle. Makes it easy to drain the fuel tank on a generator to keep fresh fuel in it.

And welcome to the forum.