If you're looking to create a vortex in a bottle, there are a few things you'll need to do. First, find a bottle that's tall and narrow. Next, fill the bottle about halfway with water. Then, add a drop or two of dish soap to the water and screw the lid on tightly. Finally, hold the bottle near the edge of a table or counter and quickly spin it around in a circle. The centrifugal force will cause the water to spin around rapidly and form a vortex.