All you need is:
Glass jar, or anything glass
Glass etching cream (I used Armour Etch)
Contact paper (or vinyl stencils)
A round object to trace a circle (if you are doing a circle)
Step 1: Draw your design on the transparent side of the contact paper. Not the paper side.
Step 2: Using the exacto knife, cut out your pattern and stick to the glass where you want it. Here, I wanted the letter F and the circle around it to be etched. In the other two jars you will see below, I etched the background and left the letters un-etched. NOTE: Clean the glass really well before doing this step. It made a difference when I didn't!
Step 3: Evenly coat the glass with the cream, and let it sit for around 5 minutes.
Step 4: Wash off the etching cream (making sure to wear a glove!) then remove the stencil. Below is my first etch. I did some touch-ups where the cream didn't etch. I think the problem was that I didn't clean the glass first.
Flour will go in the "F" jar, and sugar in the "S" jar. The third jar has the kanji for "rice."