This will allow about 4 hours of burning without refilling and re-lighting. Reliable pumps are common now to maintain pressure without heating the gas tank and you don't have to be an arsonist to light one. More recently, a second valve, right near the burner has been added to some models allowing the stove to burn at a simmer and stay lit. The first valve is always mounted at the top of the fuel bottle. With no second valve a stove will have high and medium high, but no low level.
Windscreens come with many modern stoves.
They are all like thick aluminum foil that can be unfolded into a cylinder that encloses the whole burner part of the stove. When there is no wind, they still are great for focusing the heat on the pot more so and diminish boiling time. Finally, a word about cleaning needles. All stoves have a single jet that all the gas vapor blows out from. Sometimes this jet gets clogged with carbon or something and a fine wire, called the cleaning needle must be inserted to poke the hole clear again.