Transferring the designs to the bottles is a challenge as it's not as simple as just using some tracing paper! I could freehand the designs, however, I want the designs as accurate as possible, especially the text, as I need it to be the same on all four bottles.

Tracing paper does not work as the pencil does not transfer to the glass so the design cannot be seen.

Tracing paper does however work on a painted surface. I decided to paint a bottle with a thin layer of white acrylic paint. I could then trace and etch the outline onto this and then wash off the paint after the outline has been etched on as the paint is not waterproof. This then leaves a clear surface to etch into.

I have found this to be the best solution to the problem. Since then I have also discovered carbon tracing which may work better and eliminated the steps involving painting the bottle. If there were more funds for the project then this may have been a good way to go.