What materials should be used to make water pipes?

Water pipes should be made from materials that are durable, non-toxic, and resistant to heat and corrosion. Common materials include borosilicate glass, which is known for its strength and thermal resistance; stainless steel, which is durable and easy to clean; and food-grade silicone, which is flexible and safe. Additionally, acrylic can be used for a lightweight option, though it may be less durable than glass or metal. It's important to ensure that any material used does not leach harmful substances into the water.