Meet your ultimate travel partner: the Hydro Flask® Standard Mouth With Flex Cap 21oz. Compact enough to slip into a small shoulder bag, side pocket of your pack, or car cup holder, it keeps you refreshed with hours of ice-cold hydration, without adding extra weight. 

Available in sizes: O/S

• TempShield® double-wall vacuum insulation keeps drinks cold up to 24 hours, hot up to 12
• Flex Cap is leakproof when closed
• Honeycomb™ Insulated Cap for maximum temperature retention
  
• Color Last™ powder coat is durable, sweat-free and colorful