Thoroughly wash jars with soap and hot water and let them dry completely before using.
Using a medium sized paint brush, brush on a coat of white glass paint on to the jars.
Prepare the printed paper napkins by removing additional ply layers leaving just the one printed layer.
With a pair of scissors cut around the individual images.
After the painted jars have dried, apply a thin layer of Mod Podge onto the jar on one side with a paintbrush.
Place the cutout on top of the glued area and gently press down with your fingers.
Apply another coat of Mod Podge over top of the paper cutout to seal.
Continue these steps for applying the other paper napkin cutouts, randomly placing them around the jars.
Leave the Mod Podge sealer to dry fully before using the jars as Summer vases. Place real or artificial flowers inside the jar.