1. Plastic Bottles: They are widely available and reasonably priced, but the question of
chemical leaching remains unsolved.
2. Stainless Steel Bottles: Durable, non-corrosive and usually insulated
so as to retain temperature.
3. Glass Bottles: Free of chemicals, environmentally friendly, but also
very fragile.
4. Collapsible Bottles: Good for travel, space saving but often not well
insulated.
5. Aluminum Bottles: Light weight, recyclable but may leave a metallic
aftertaste.