What is the healthiest water bottle to use according to research?

Extensive research answers what is the healthiest water bottle to use:

• Medical-Grade Stainless Steel: Proven healthiest by multiple studies
• Zero Chemical Leaching: No BPA, phthalates, or other toxins
• Natural Antibacterial: Inherent properties prevent bacterial growth
• Temperature Stable: Safe at all temperatures unlike plastic
• Non-Porous Surface: Cannot harbor bacteria or mold
• Lifetime Safety: Doesn't degrade like other materials

Studies comparing materials consistently show medical steel as the answer to what is the healthiest water bottle to use.