how to curl the 2 liter bottles
 

Ron It appears in some of your pictures of the 2 liter bottles, the cut end has been neatly folded over to leave a smooth top edge. How were you able to achieve this, or am I seeing things. I have tried boiling water, but the plastic just shrank and never became pliable. Any help would be greatly appreciated.
Travis

Heat a old Teflon pan to 250 degrees.
Slowly turn the bottle and if your lucky it will start to curl inward.
When the bottle is still pliable cram a 16 oz solo cup to form it perfectly around the cup.