If anybody wants to give the dry ice method a try and you don't have a bubble bag, I suggest using a grinder with a kief screen. This is the method I used when I did this technique and everything worked out beautifully.
I got some dry ice in the mail from Omaha Steaks one day and decided to experiment, here is what I did, it is very simple.
I ground up around 2 grams of premium bud and I followed that by grinding up some chunks of dry ice. This method works by collecting tricomes that have become brittle due to the cold and have broken off the bud, so you need to let the bud and dry ice chill for a minute or so before you start shaking.
Once cold, simply shake you grinder until you are satisfied with the result. You may have to replace the dry ice once or twice throughout this process as it tends to disappear pretty quickly.
I have a very fine kief screen so I only collected the best material, but with a larger micron bag or screen you would get much more, yet slightly less premium kief. With the screen I used, I had a yield of 0.6 grams for 2 grams of bud, which is not bad, especially as you can use the plant matter you used in joint/blunts or vaping...here is a pic of some of the result, which is super sticky/potent and also smells and tastes amazing btw: