Well the chalk "thingy" is actually called an X-Static bag here is one place I found that you can purchase it http://sparklensprinkle.com/o/product_info.php?products_id=3150 . FYI- The website also offered the following information for other uses:
You can use the bag to de-tack adhesives and sticky stuff. Just simply pat your Anti static Bag over the residue. Wipe your scissors with the Anti Static Bag to help prevent a build up of sticky residue when cutting out stamps mounted on to EZmount, or sticky backed items etc.
If you use a tidy tray for collecting your embossing powder, glitter etc - then wipe the tray with the bag before using to get most of the powder back in to your pot. I personally use a semi-gloss card stock folded in half (wiped first with the anti static Bag).
If using Versamark for stamping when colouring with chalks or mica powders - use the Anti Static Bag prior to stamping, this will help any excess chalk or mica from sticking to the card where you don't want it.
Digital Image Info:
The digital image from the cocoa pouch is from http://www.whimsiedoodles.com/index.html
Please let me know if I have forgotten something! Hope to see you next time!