Video for the clicking-averse:
Fold the left and right sides to the middle crease.
Fold the left and right sides from the center to the outside edge.
Bring the bottom right corner up to the left-most crease line.
Tuck the right side under the left side.
Bring up the bottom triangle tip and fold.
Tuck the triangle tip into the bottom.
Open it up by pushing the colored part.
Crease the corners to make it beautiful.
Fill with your junk and enjoy.