Goal and options: How to purify your water manually?

OPTIONS:
- For water purification, carry a Katadin water purifier without spare filter element and Potable Aqua water purification tablets. They can purify up to 500 liters of water each,
- For water purification, carry a Katadin water purifier with spare filter element and Potable Aqua water purification tablets. They can purify up to 500 liters of water each,
output answer: For water purification, carry a Katadin water purifier with spare filter element and Potable Aqua water purification tablets. They can purify up to 500 liters of water each,

Goal and options: To allow hard candy to harden to it's final form after baking it, you can

OPTIONS:
- Allow it to warm in the oven until it harden
- Allow it to cool at room temperature until it hardens
output answer: Allow it to cool at room temperature until it hardens

Goal and options: To cut a irregular shape out of wood for a plastic army man costume

OPTIONS:
- trace the design and use a router to cut along the lines
- trace the design and use scissors to cut along the lines
output answer:
trace the design and use a router to cut along the lines