<human>: Here is a goal: How to prepare rainwater for cooking or drinking?

How would you accomplish this goal?

OPTIONS:
- Use a large saucepan to store the water and then cool it in the fridge to use
- Use a large saucepan to boil the water and then cool it in the fridge to use
<bot>: Use a large saucepan to boil the water and then cool it in the fridge to use