Step 5 - Decorate
Starting anywhere on your bottle, add a bit of glue to the outside.
If using hot glue, attach your stones while the glue is still hot and adhesive.
If using water based glue, let it dry for a few minutes to become more "tacky" before attaching your stones.
Repeat this step until your bottle has a stony exterior.
The natural appearance makes it more attractive to birds!