Objective: How to make a dry ice implosion

Which of the following solutions is more sound in terms of naive physics reasoning?

Select from: i. Take a plastic bottle, fill it with water a quarter of the way in, and then put some dry lice into the bottle. Then seal it and run away.. ii. Take a plastic bottle, fill it with water a quarter of the way in, and then put some dry ice into the bottle. Then seal it and run away..
ii.