P.S. I apologize for the light glare in some of the pictures. I was limited to the camera on my phone at the time of construction.
Step 1: Materials Needed
-Nalgene Water Bottle
-One Roll of Duct Tape (Though you won't need the entire thing)
-One Wine Cork
-Pair of Sharp Scissors
As is evident, this project is extremely simple and will not dent your wallet. Additional Nalgene bottles cost roughly $10 a piece, while a roll of duct tape from Wal Mart or Target, or even from the Duct Tape Website is just $2.99. In addition, because of how the tape is used throughout this instructable, the thickness of the tape does not need to be very great, so even the generic rolls are fine.