Question: To make a piping tip from a soda bottle,
Options:
screw on the cap, cut a star shape into the cap with an X-acto knife, and then slice off the top of the bottle 1" from the end with the knife.
screw on the cap, cut a star shape into the cap with a serrated knife, and then slice off the top of the bottle 1" from the end with the knife.
Answer: screw on the cap, cut a star shape into the cap with an X-acto knife, and then slice off the top of the bottle 1" from the end with the knife.