Please choose the correct solution to the question: How can I make homemade Ice packs for injuries at home?

Solution1: Mix 3 parts water and 1 part rubbing alcohol in a paper bag, it will get very cold but won't freeze hard.

Solution2: Mix 3 parts water and 1 part rubbing alcohol in a ziploc bag, it will get very cold but won't freeze hard.

Answer format: solution1/solution2
Answer: solution2