paint spray in color of choiceI used golden and black; choose one designed to work on plastic
Clean and dry bottles
Cut the top off. Add tape around the rim
Spread some primer on bottles.
Spray paint the bottle and leave to dry. If you choose to make a pattern as I did, spray the main color first, leave to completely dry as indicated on the spray, add tape above the area where you want to add the second color, then spray the second color and leave to dry completely. I find it useful to remove the tape a few minutes after I added the second color otherwise the paint might chip when the tape is removed.