This is a test of commonsense. Complete the next sentence:

How to stretch high heels 
Fill two plastic sandwich bags 1/4 of the way up with water. 
Seal the bag so that no water can escape. Use easy-to-seal ziploc bags for convenience.

OPTIONS:
- Save space in between your two bags, because having more space will help improve your posture. Avoid filling too often, since it can cause muscle strain and back pain.
- These will hold the insole of your shoes in place because the water from your water-soaked sole will prevent it from being sticky or runny. Place your insole on the insole of a folding shoe.
- Lay flat in the middle of the bag and hold one end in each hand. Take your toes and run your thumbs back and forth in a circular motion in one direction.
- Otherwise, tie the opening of each bag shut. Put the water bags into your shoes.
Otherwise, tie the opening of each bag shut. Put the water bags into your shoes.