My girlfriend and I are getting everything ready for a week long trip kayaking in Glacier Bay, Alaska. During the planning, we started to wonder how long a full fuel bottle will last and how much fuel we need to take with us (more than one bottle).
Unsu...I guess I'm a little confused on how you mean... Are you wondering about how many days the fuel in one bottle will last you, or are you wondering about the durability of the fuel bottle itself?
If it's a matter of how long the fuel will last, then consider how many times a day you'll be cooking, how long does your stove take to boil, and what size fuel bottle(s) will you be bringing?
If it's a matter of durability, I've got the same banged up old bottle that I've been using for years. All I do is replace the seal ring on the cap and make sure that it doesn't leak. (of course, switching to the alcohol stove and plastic bottles has cut the wear/tear on the old MSR bottle)
I think it depends upon the type of fuel, altitude, and the type of stove you'll be using. Also the types of food, the size of your pots, the number in your party, outside temperature, and if you have a wind screen, will have some affect on fuel consumption. In other words, "your milage may vary", depending on if you're driving a Prius or a Hummer. You did not specify the size of the bottle. MSR and other manufacturers have 12 oz, 22 oz, and 33 oz capacity bottles.
If you're using a MSR Whisperlite, Simmerlite, or a SVEA Climber stove that uses white gas and there is just the two of you, eating a hot breakfast, freeze dried dinner, and a few beverages, you'll probably go through a 33 oz. cannister of fuel in a week. Since you'll be kayaking, you don't have to worry much about the weight involved so you could bring a couple of the 22 oz MSR bottles and be totally safe.
Since you'll probably be in an area that allows campfires, having a little "Liquid Boy Scout" will help in getting those wet twigs started. If you don't mind getting your pots dirty, you can probably save some fuel by heating some of your meals and beverage water over an open campfire.