Step 4Stretch the Top & Bottom Sections
1. Rub a small amount of petroleum jelly on the bottom of the full can of beer.
2. Carefully insert the bottom of the full can in to the cut bottom from the first can.
3. Using a small piece of plywood or the like, apply firm and even pressure to force one can in to the other.
note: Do this step incrementally; Press the can in a little way and let the pressure build up push it back out. then repeat until you can force the can about half way in to the bottom section.
4. Repeat these steps with the top section of the fist cut can.
note: Continue using the bottom of the full can to stretch the second piece.
Once both can section have been properly stretched, puncture the bottom section as shown. Puncture the top section anywhere you like, as it will be removed later.
Puncturing the cans now will allow you to fully insert them in the following steps.
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