First, cut the top of a water or soda bottle into a dome, then cut some strips down to the nose of the bottle.
Flop the petals back, and on the opposite side of the nose (which in case you haven't noticed is where you screw on the top) hot glue the cap on. Then, color your flower.
Then roll a piece of construction paper into a roll, and stick it into the nose of the bottle.
Then add embellishments and color the cap and voila! You have a beautiful flower that never dies!