Step 4: The Drink
Now you’re ready to drink, or to treat your water more thorougly with chemicals or UV. If the water is very dirty, you can cover the input end of the filter with a coffee filter and a rubber band, in which case the flow rate will probably be reduce.
If you don't want the filter to stand deep in the bottle (like on the picture above), you could make a stand out of a smaller soda bottle. Cut the bottom and the neck to make a tube, and put it between the Nalgen and the funnel.
Also, one could attach some wire on the funnel, so you can suspend the filter above your container.