Place coffee filters onto the paper towels and paint with watercolors.
Allow coffee filters to dry.
Tear painted coffee filter into pieces. The size is up to you, it just makes them easier to attach to the surface of the jar. Smaller pieces (about 2-inches) mean less wrinkles.
Apply a thin coat of Mod Podge to a small section of the jar.
Place a piece of coffee filter onto the Mod Podge, then apply a thin coat over the top to secure it to the jar.
Repeat the last two steps, overlapping the pieces slightly, until your jar is covered (leaving the rim untouched).
Apply a final generous (but not dripping) coat of Mod Podge over everything.
Allow to dry completely.
Add a ribbon or twine around the rim of your jar, securing with white glue, Mod podge, or hot glue.