Given that there's a wire in the line, Im not so keen on the idea..

Take two whisperlouds, and an extra 11Oz bottle, - empty that only weighs 3oz which is a heck of a lot less than the 2nd whisperloud - and by the time you're carrying a griddle - man that's practiacally spike camp! (exactly where my whisperlouds get the most use <img src="/forums/images/graemlins/smile.gif" alt="" /> )