Place a few overlapping strips of painters tape on a cutting surface. Trim the pattern and place it over the tape. Now tape the pattern down.
Using an X-acto or other sharp blade, carefully cut out your design.
Measure the tape against the bottle and create tick marks, about 1/2 inch apart.
Place the tape along the side of your bottle, then use the knife to carefully slice ONLY through the tape.
Remember: whatever you leave covered will be clear.
If you want your design to be clear, skip to the next step, then prime.
I wanted a two tone design for this bottle. I laid down the white primer first. You'll want a primer that adheres to plastic, usually Krylon or any indoor/outdoor spray primer.
One coat should be enough, just spray light and even. Allow it to dry.
Depending on the humidity and temperature, it should take anywhere from 10 mins to an hour.