take some tin foil and form a bowl over the mouth part of the bottle. poke some holes in it punch a hole halfway down the bottle and one on the other side a little lower for a carb take a straw or empty pen and shove it in the top hole and seal it with gum or tape or something
Make a hole in the side of the bottle about the width of a pen (you can use a lighter but I prefer not to cause im burning plastic) take the ink tube thing out of the pen fill it up a few inches below were you made the hole and and wrap some foil around the pen tube to make the bowl stick the pen in and light