I've been having so much fun with the new Mini Treat Bag Thinlit (#137547, $39.95)! Although it works with any of our paper, my favorite paper to use is the Typeset DSP (#133704, $12.95). It's thinner than regular DSP, and works great for this particular bag.
Here is my favorite way to use the bag - as a card! You can see the slip of Blushing Bride cardstock peeking out of the top. Just slide it out and write your note! This whole "card" will fit in a standard size envelope to be mailed!