Thanks for writing. Unfortunately, there's nothing I've ever found that will keep chipmunks, squirrels, or other critters from bothering your container gardens.
If you're planting seeds in your containers, you can cover the soil with mesh such as chicken wire to keep them from digging. The plants will grow up through the holes.
You can also try spraying your plants with a product called Hot Pepper Wax (or make your own version by mixing a teaspoon or so of hot pepper flakes in a quart of water with a dash of dish soap or vegetable oil). Some gardeners have found this kind of spray helpful, but you do have to reapply it frequently.
Thanks for writing. I hope this helps. Good luck!
---Justin, Senior Garden Editor, BHG.com