I'm sure you've seen painted jars on Pinterest. This idea is developed on that one with the added detail of a chalkboard painted oval on one side.
Here is a quick how-to:
Clean the glass jar. Pour a little paint inside. I used Martha Stewart Paints as they are good for many surfaces. Roll the jar around to let the paint coat the sides. Use a foam brush to help spread it around. Turn it upside down to help coat everywhere. Let the jar dry.
When dry, you may notice some thin areas when the jar is held up to the light. You can try and solve this problem by doing a second coat.
Note – you can clean up the edges at the lip with a bit of paint thinner.
If you don't have a stencil to paint a shape on the outside of your jar, you can make your own by folding a piece of paper in half. Cut out one side of the design (mine was a simple oval shape) and open the fold to see the matching side.
Use masking tape to attach the stencil to the outside of the jar. I used Benjamin Moore chalkboard paint, but you can use any brand. Martha Stewart makes it as well and here is another one: Chalkboard Paint .
Use a foam brush (helps to eliminate brush strokes) to apply the chalkboard paint. Try to paint away from the edges of the stencil, going towards the centre, with a little amount of paint on the brush. This will help to not have paint under the stencil.
Once the chalkboard paint dries, you may want to apply a 2nd coat.
These jars are fun for lots of things: holding paintbrushes, pencils, dried flowers, etc.