Ebakeev,
Then you must lead her to a clearer understanding, unless of course she already has a clear understanding. In the latter event, you really do need to work on your survival skills. <img src="images/graemlins/wink.gif" alt="" />
Alternatively you could change the real purpose.
I suspect that if my wife found one in my wallet, her reaction would be to reproach me for carrying my emergency water container in such a poor way. And she'd be right. Oh, well ...
John