All you have to do is wash (and dry very well) your pickle jar, fill it up with about an inch or two of the paint color of your choice and twirl it around on it's side till the paint covers all the interior glass.
I then took two wooden skewers and placed them over the paint bucket and placed the pickle jar upside down on top of the skewers. This allows the extra paint to drip out, slowly and evenly, so the interior of the jar is smooth and flawless.
Let it sit upside over the paint bucket like this for about an hour or two. Then put in a safe, dry place where the paint can dry. Because the paint is on the thick side, it takes about 48 hours to dry to perfection.
And voila! A beautiful, eclectic, do it your self vase! You could do this with SO many other things, besides just pickle jars! Think what fun centerpieces these could make at a wedding - so customizable and SO CHEAP!!!