Vortex
My Instructable is called vortex because when you flip it and spin it it will make a vortex that will help the water flow down.
Materials
The materials you will need to make this Instructable is clear rap duct tape and two lager water bottles.
Construction
You will need two large water bottles I got mine at my local 711.
Final Step
The Final Step you rap the clear rap around the two mouth holes on the water bottles you my want to layer it a couples times. Then you duct-tape the clear rap you can add sparkles or glitter.
This is how my vortex works I learned how to make this a long time ago when I was a little kid.