Full credit for this idea belongs to wbeaty over ar Youtube,
I'm just the instrustables messenger;)
Step 1: Supplies
- Dry ice(Pellets probably are the best option)
-99% isopropyl alcohol( Can be found at most grocery/drug stores.)
-Something sharp to cut the bottles apart with.
Step 2: Cut Bottles.
The smaller container needs to be cut to about the same height, ensure that by testing the smaller container inside the larger.