Upgrade your hydration experience with the Hydro Flask Standard Mouth Flex Straw Cap. This cap fits all Standard Mouth Hydro Flask bottles and features a straw that can be easily trimmed for a perfect fit. Its honeycomb insulated cap keeps your beverages at their ideal temperature for hours, while the durable Flex Strap offers comfort and portability. Plus, the removable components make cleaning a breeze!

• Fits all Hydro Flask Standard Mouth bottles
• Honeycomb insulation 
• Leakproof 
• BPA- and toxin-free