This is a great tip from JJMathes: ‘Have you ever needed to fill your water container only to find there wasn’t enough clearance for you to get the opening of your container under the flow? When water levels are low the flow doesn’t always shoot out far enough to catch the water, it rolls around the contour of the rock making it nearly impossible to fill a bottle or bladder. Altering the flow is an easy fix by using the windscreen from your cook kit to form a spout; or anything flat that won’t absorb water will work, even a broad leaf.’ http://gossamergear.com/wp/ever-have-trouble-collecting-water
Sometimes you find water oozing down a vertical rock face. If there is a tiny crack in it you can drive a sharpened twig or matchstick in the crack to bring the water out to your drink bottle as in the photo above.