Please choose the correct ending to complete the given sentence: Health: [header] How to make an ice gel pack [title] Mix the water and rubbing alcohol. [step] You can make an ice pack using two parts water and one part alcohol. The alcohol will prevent the water from completely freezing.

Ending1: To start, mix your water and rubbing alcohol together in a mixing bowl. [substeps] Two parts water to one part alcohol means for every two units of water, there should be one unit of alcohol. Ending2: You can also make ice cream with both solid ingredients, and the water will slow down the process. [substeps] Before using the ice pack, drizzle some melted ice cream on the ice cream. Ending3: [substeps] Add a small amount of warm water to a covered ice cube tray. Mix the water and rubbing alcohol together with a spoon or ice cream machine. Ending4: Use the measuring cup to measure out about 5 ounces (120 milliliters) of water , 8 ounces (200 milliliters) of rubbing alcohol, and 1 tablespoon (15 milliliters) of rubbing alcohol. [substeps] You can also make your own alcohol gel gel by mixing equal parts alcohol and water together using equal parts water and rubbing alcohol.

Answer format: ending1/ending2/ending3/ending4