In The Complete Walker Colin Fletcher has a number of suggestions regarding the Sierra cup... (4th edition, pgs 272-274). As far as I am concerned, the most helpful one is the bending of the handle to provide a more comfortable grip. Also be aware that they come in a number of different sizes and materials. I find my oversized cup (sorry... can't remember where I got it...) more than adequate for day hikes (even if it doesn't fit on the bottom of my water bottles...).
Hope this helps