2oldman ... your can is Type-1.
What I use is Type-2, which has two openings in the top - with one of them having a long flexible metal dispensing spout for precise aim and the other being a spring loaded fill opening. One of the openings has a pressure relief valve - which is probably meant to vent fume pressure automatically so maybe one doesn't get liquid spewed on them when atttempting to refill or dispense after the can has been exposed to high temperatures.
This link has a more detailed description of the Type-2 can that I carry in our RV:
http://www.bestmaterials.com/detail.aspx?ID=15583