Thermos Vacuum Insulated 18-Ounce Hydration Bottle – Link

Amazon currently has this at only $12.99!

• 18-ounce hydration bottle with durable stainless steel interior and exterior
• Flip-top lid with built-in sipping design; button activated lid and additional clasp for secure travel
• TherMax double wall vacuum insulation locks in temperature to preserve flavor and freshness
• Condensation-free with cold beverages–won’t leave rings behind